inform((_:search,area,'east');(_:search,stars,'4');(_:search,type,'Hotel'))
user
I need to book a hotel in the east that has 4 stars .
request((_:search,pricerange,?);(_:search,type,'Hotel'))
system
I can help you with that . What is your price range ?
inform((_:search,has_internet,'yes');(_:search,has_parking,'yes');(_:search,type,'Hotel'))
user
That does n't matter as long as it has free wifi and parking .
inform((_:result,name,'Allenbell');(_:result,name,'Warkworth House');(_:result,pricerange,'cheap');(_:result,pricerange,'moderately priced');(_:result,type,'Hotel'))
system
If you 'd like something cheap , I recommend the Allenbell . For something moderately priced , I would recommend the Warkworth House .
inform((_:search,name,'wartworth');(_:search,people,'1');(_:search,stay,'one');(_:search,type,'Hotel'))
user
Could you book the Wartworth for one night , 1 person ?
request((_:booking,day,?);(_:booking,type,'Booking'))
system
What day will you be staying ?
inform((_:search,day,'friday');(_:search,type,'Hotel')) request((_:result,ref,?);(_:result,type,'Hotel'))
user
Friday and Can you book it for me and get a reference number ?
reqmore() inform((_:booking,ref,'BMUKPTG6');(_:booking,type,'Booking'))
system
Booking was successful . 
 Reference number is : BMUKPTG6 .   Can I help you with anything else today ?
inform((_:search,day,'friday');(_:search,departure,'cambridge');(_:search,destination,'bishops stortford');(_:search,type,'Train'))
user
I am looking to book a train that is leaving from Cambridge to Bishops Stortford on Friday .
inform((_:result,amount,'a number');(_:result,leave_at,'throughout the day');(_:result,type,'Train')) request((_:search,leave_at,?);(_:search,type,'Train'))
system
There are a number of trains leaving throughout the day .   What time would you like to travel ?
inform((_:search,arrive_by,'19:45');(_:search,type,'Train'))
user
I want to get there by 19:45 at the latest .
inform((_:result,arrive_by,'18:07');(_:result,leave_at,'17:29');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
Okay ! The latest train you can take leaves at 17:29 , and arrives by 18:07 . Would you like for me to book that for you ?
request((_:result,duration,?);(_:result,leave_at,?);(_:result,ticket,?);(_:result,type,'Train'))
user
Yes please . I also need the travel time , departure time , and price .
reqmore() inform((_:booking,category,'Train');(_:booking,duration,'38 minutes');(_:booking,ref,'UIFV8FAS');(_:booking,ticket,'10.1 GBP');(_:booking,type,'Booking'))
system
Reference number is : UIFV8FAS . The price is 10.1 GBP and the trip will take about 38 minutes . May I be of any other assistance ?
inform((_:search,day,'monday');(_:search,people,'3');(_:search,stay,'4');(_:search,type,'Hotel'))
user
Yes . Sorry , but suddenly my plans changed . Can you change the Wartworth booking to Monday for 3 people and 4 nights ?
inform((_:booking,ref,'YF86GE4J');(_:booking,type,'Booking'))
system
I have made that change and your reference number is YF86GE4J
thank()
user
Thank you very much , goodbye .
system
You 're welcome . Have a nice day !
_:search area east
_:search stars 4
_:search type Hotel
_:search area east
_:search stars 4
_:search pricerange ?
_:search has_internet yes
_:search has_parking yes
_:search type Hotel
_:search area east
_:search stars 4
_:search pricerange ?
_:search has_internet yes
_:search has_parking yes
_:result name Allenbell
_:result name Warkworth House
_:result pricerange cheap
_:result pricerange moderately priced
_:result type Hotel
_:search name wartworth
_:search people 1
_:search stay one
_:search type Hotel
_:search area east
_:search stars 4
_:search pricerange ?
_:search has_internet yes
_:search has_parking yes
_:result name Allenbell
_:result name Warkworth House
_:result pricerange cheap
_:result pricerange moderately priced
_:result type Hotel
_:search name wartworth
_:search people 1
_:search stay one
_:booking day ?
_:booking type Booking
_:search day friday
_:search type Hotel
_:result ref ?
_:search area east
_:search stars 4
_:search pricerange ?
_:search has_internet yes
_:search has_parking yes
_:result name Allenbell
_:result name Warkworth House
_:result pricerange cheap
_:result pricerange moderately priced
_:result type Hotel
_:search name wartworth
_:search people 1
_:search stay one
_:booking day ?
_:result ref ?
_:system inquired _:user
_:booking ref BMUKPTG6
_:booking type Booking
_:search day friday
_:search departure cambridge
_:search destination bishops stortford
_:search type Train
_:search area east
_:search stars 4
_:search pricerange ?
_:search has_internet yes
_:search has_parking yes
_:result name Allenbell
_:result name Warkworth House
_:result pricerange cheap
_:result pricerange moderately priced
_:search name wartworth
_:search people 1
_:search stay one
_:booking day ?
_:result ref ?
_:system inquired _:user
_:booking ref BMUKPTG6
_:booking type Booking
_:search day friday
_:search departure cambridge
_:search destination bishops stortford
_:result amount a number
_:result leave_at throughout the day
_:result type Train
_:search leave_at ?
_:search arrive_by 19:45
_:search type Train
_:search area east
_:search stars 4
_:search pricerange ?
_:search has_internet yes
_:search has_parking yes
_:result name Allenbell
_:result name Warkworth House
_:result pricerange cheap
_:result pricerange moderately priced
_:search name wartworth
_:search people 1
_:search stay one
_:booking day ?
_:result ref ?
_:system inquired _:user
_:booking ref BMUKPTG6
_:booking type Booking
_:search day friday
_:search departure cambridge
_:search destination bishops stortford
_:result amount a number
_:search leave_at ?
_:search arrive_by 19:45
_:search type Train
_:result arrive_by 18:07
_:result leave_at 17:29
_:result type Train
_:system offered _:booking
_:booking category Train
_:result duration ?
_:result leave_at ?
_:result ticket ?
_:search area east
_:search stars 4
_:search pricerange ?
_:search has_internet yes
_:search has_parking yes
_:result name Allenbell
_:result name Warkworth House
_:result pricerange cheap
_:result pricerange moderately priced
_:search name wartworth
_:booking day ?
_:result ref ?
_:search departure cambridge
_:search destination bishops stortford
_:result amount a number
_:search leave_at ?
_:search arrive_by 19:45
_:result arrive_by 18:07
_:result leave_at 17:29
_:result type Train
_:system offered _:booking
_:result duration ?
_:result leave_at ?
_:result ticket ?
_:system inquired _:user
_:booking category Train
_:booking duration 38 minutes
_:booking ref UIFV8FAS
_:booking ticket 10.1 GBP
_:booking type Booking
_:search day monday
_:search people 3
_:search stay 4
_:search type Hotel
_:search area east
_:search stars 4
_:search pricerange ?
_:search has_internet yes
_:search has_parking yes
_:result name Allenbell
_:result name Warkworth House
_:result pricerange cheap
_:result pricerange moderately priced
_:search name wartworth
_:booking day ?
_:result ref ?
_:search departure cambridge
_:search destination bishops stortford
_:result amount a number
_:search leave_at ?
_:search arrive_by 19:45
_:result arrive_by 18:07
_:result leave_at 17:29
_:result type Train
_:system offered _:booking
_:result duration ?
_:result leave_at ?
_:result ticket ?
_:system inquired _:user
_:booking category Train
_:booking duration 38 minutes
_:booking ticket 10.1 GBP
_:search day monday
_:search people 3
_:search stay 4
_:search type Hotel
_:booking ref YF86GE4J
_:booking type Booking