inform((_:search,departure,'cambridge');(_:search,leave_at,'18:15');(_:search,type,'Train'))
user
Are there trains leaving Cambridge after 18:15 ?
request((_:search,day,?);(_:search,destination,?);(_:search,type,'Train'))
system
Yes . Can you help me narrow down the choices with a day to leave and destination ?
inform((_:search,day,'saturday');(_:search,destination,'stevenage');(_:search,type,'Train'))
user
I 'm looking for one that goes to Stevenage on Saturday .
inform((_:result,arrive_by,'20:10');(_:result,leave_at,'19:21');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
I have a train leaving at 19:21 and arriving at 20:10 , if that works .
inform((_:search,people,'three');(_:search,type,'Train'))
user
Yes , can you book three tickets on it , please ?
inform((_:booking,category,'Train');(_:booking,ref,'S74F7IZS');(_:booking,ticket,'30.72 GBP');(_:booking,type,'Booking'))
system
Booking was successful , the total fee is 30.72 GBP payable at the station . 
 Reference number is : S74F7IZS .
inform((_:search,food,'americas');(_:search,pricerange,'cheap');(_:search,type,'Restaurant'))
user
Great ! Can you help me find a cheap restaurant that serves the americas food ?
canthelp((_:search,type,'Restaurant')) reqmore()
system
I do not show any restaurants that fit that criteria . Do you have any other preferences ?
user
I just need something with American food .
offer((_:booking,type,'Booking')) inform((_:result,food,'north American');(_:result,name,'Gourmet Burger Kitchen');(_:result,pricerange,'expensive');(_:result,type,'Restaurant'))
system
I have found Gourmet Burger Kitchen , they serve north American food , although they are expensive . Would you be interested in booking here ?
thank()
user
No thank you , I am just gathering information for now
reqmore()
system
Is there anything else I can help you with today ?
request((_:result,address,?);(_:result,type,'Restaurant'))
user
Can I have the address for the restaurant .
reqmore() inform((_:result,address,'Regent Street');(_:result,name,'Gourmet Burger Kitchen');(_:result,type,'Restaurant'))
system
Absolutely !   The Gourmet Burger Kitchen is located on Regent Street .   Would you like the phone number ?   Or anything else ?
inform((_:search,food,'chinese');(_:search,pricerange,'cheap');(_:search,type,'Restaurant'))
user
If there 's no cheap American food restaurant , can you recommend a cheap restaurant that serves Chinese food ?
system
Certainly , there 's Charlie Chan in the centre area that serves cheap Chinese food . Would you like more information or to book it ?
_:search departure cambridge
_:search leave_at 18:15
_:search type Train
_:search departure cambridge
_:search leave_at 18:15
_:search day saturday
_:search destination stevenage
_:search type Train
_:search departure cambridge
_:search leave_at 18:15
_:search day saturday
_:search destination stevenage
_:result arrive_by 20:10
_:result leave_at 19:21
_:result type Train
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search people three
_:search type Train
_:search departure cambridge
_:search leave_at 18:15
_:search day saturday
_:search destination stevenage
_:result arrive_by 20:10
_:result leave_at 19:21
_:result type Train
_:system offered _:booking
_:search people three
_:booking category Train
_:booking ref S74F7IZS
_:booking ticket 30.72 GBP
_:booking type Booking
_:search food americas
_:search pricerange cheap
_:search type Restaurant
_:search departure cambridge
_:search leave_at 18:15
_:search day saturday
_:search destination stevenage
_:result arrive_by 20:10
_:result leave_at 19:21
_:result type Train
_:system offered _:booking
_:search people three
_:booking category Train
_:booking ref S74F7IZS
_:booking ticket 30.72 GBP
_:booking type Booking
_:search food americas
_:search pricerange cheap
_:search type Restaurant
_:system canthelp _:search/6a70c5ef
_:search/6a70c5ef type Restaurant
_:system inquired _:user
_:search departure cambridge
_:search leave_at 18:15
_:search day saturday
_:search destination stevenage
_:result arrive_by 20:10
_:result leave_at 19:21
_:system offered _:booking
_:search people three
_:booking category Train
_:booking ref S74F7IZS
_:booking ticket 30.72 GBP
_:booking type Booking
_:search food americas
_:search pricerange cheap
_:search type Restaurant
_:system canthelp _:search/6a70c5ef
_:search/6a70c5ef type Restaurant
_:system inquired _:user
_:result food north American
_:result name Gourmet Burger Kitchen
_:result pricerange expensive
_:result type Restaurant
_:search departure cambridge
_:search leave_at 18:15
_:search day saturday
_:search destination stevenage
_:result arrive_by 20:10
_:result leave_at 19:21
_:system offered _:booking
_:search people three
_:booking category Train
_:booking ref S74F7IZS
_:booking ticket 30.72 GBP
_:booking type Booking
_:search food americas
_:search pricerange cheap
_:search type Restaurant
_:system canthelp _:search/6a70c5ef
_:search/6a70c5ef type Restaurant
_:result food north American
_:result name Gourmet Burger Kitchen
_:result pricerange expensive
_:result type Restaurant
_:system inquired _:user
_:result address ?
_:search departure cambridge
_:search leave_at 18:15
_:search day saturday
_:search destination stevenage
_:result arrive_by 20:10
_:result leave_at 19:21
_:system offered _:booking
_:search people three
_:booking category Train
_:booking ref S74F7IZS
_:booking ticket 30.72 GBP
_:booking type Booking
_:system canthelp _:search/6a70c5ef
_:search/6a70c5ef type Restaurant
_:result food north American
_:result pricerange expensive
_:system inquired _:user
_:result address Regent Street
_:result name Gourmet Burger Kitchen
_:result type Restaurant
_:search food chinese
_:search pricerange cheap
_:search type Restaurant