inform((_:search,area,'centre');(_:search,type,'Attraction'))
user
What good attractions are there in the city centre ?
request((_:search,category,?);(_:search,name,?);(_:search,type,'Attraction')) inform((_:result,amount,'over 40');(_:result,entrance_fee,'free');(_:result,type,'Attraction'))
system
There are over 40 of them , many of which are free ; did you have anything more specific in mind ?
user
No , just pick something .
inform((_:result,entrance_fee,'free');(_:result,name,'Cambridge Contemporary Art Museum');(_:result,type,'Attraction'))
system
The Cambridge Contemporary Art Museum is a good attraction that is free . Would you like the address or directions ?
request((_:result,address,?);(_:result,phone,?);(_:result,type,'Attraction'))
user
Actually , can I get the address and phone number please ?
reqmore() inform((_:result,address,'6 Trinity Street');(_:result,phone,'01223324222');(_:result,type,'Attraction'))
system
Sure , it is located at 6 Trinity Street .   The phone number is 01223324222 .   Can I help you further ?
inform((_:search,departure,'stevenage');(_:search,destination,'cambridge');(_:search,type,'Train'))
user
Yes .   I need to find a train to travel from Stevenage to Cambridge .
inform((_:result,duration,'49 minutes');(_:result,leave_at,'every two hours');(_:result,type,'Train')) request((_:search,day,?);(_:search,leave_at,?);(_:search,type,'Train'))
system
Okay , what day and what time would you like to leave ? The ride is about 49 minutes and the train comes every two hours .
inform((_:search,arrive_by,'20:00');(_:search,day,'saturday');(_:search,leave_at,'dontcare');(_:search,type,'Train'))
user
I need to leave Saturday and must arrive by 20:00 .   I do n't care what time the train leaves as long as I arrive on time .
inform((_:result,arrive_by,'18:43');(_:result,departure,'stevenage');(_:result,destination,'cambridge');(_:result,id,'TR2442');(_:result,leave_at,'17:54');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
I have train TR2442 leaving stevenage at 17:54 and arriving in cambridge at 18:43 .   Would you like to book this ?
inform((_:search,people,'4');(_:search,type,'Train'))
user
Yes , please . I need 4 tickets .
inform((_:booking,category,'Train');(_:booking,ref,'NXSAEV12');(_:booking,type,'Booking'))
system
Great ! That was successful and your booking reference number is NXSAEV12 .
thank()
user
That should do it . thank you !
system
Ok great !   I hope that you enjoy your travels !   Thank you for contacting the Cambridge TownInfo centre .
_:search area centre
_:search type Attraction
_:search area centre
_:search category ?
_:search name ?
_:search type Attraction
_:result amount over 40
_:result entrance_fee free
_:result type Attraction
_:search area centre
_:search category ?
_:search name ?
_:search type Attraction
_:result amount over 40
_:result entrance_fee free
_:result name Cambridge Contemporary Art Museum
_:result type Attraction
_:result address ?
_:result phone ?
_:search area centre
_:search category ?
_:search name ?
_:result amount over 40
_:result entrance_fee free
_:result name Cambridge Contemporary Art Museum
_:system inquired _:user
_:result address 6 Trinity Street
_:result phone 01223324222
_:result type Attraction
_:search departure stevenage
_:search destination cambridge
_:search type Train
_:search area centre
_:search category ?
_:search name ?
_:result amount over 40
_:result entrance_fee free
_:result name Cambridge Contemporary Art Museum
_:system inquired _:user
_:result address 6 Trinity Street
_:result phone 01223324222
_:search departure stevenage
_:search destination cambridge
_:result duration 49 minutes
_:result leave_at every two hours
_:result type Train
_:search arrive_by 20:00
_:search day saturday
_:search leave_at dontcare
_:search type Train
_:search area centre
_:search category ?
_:search name ?
_:result amount over 40
_:result entrance_fee free
_:result name Cambridge Contemporary Art Museum
_:system inquired _:user
_:result address 6 Trinity Street
_:result phone 01223324222
_:search departure stevenage
_:search destination cambridge
_:result duration 49 minutes
_:search arrive_by 20:00
_:search day saturday
_:search leave_at dontcare
_:result arrive_by 18:43
_:result departure stevenage
_:result destination cambridge
_:result id TR2442
_:result leave_at 17:54
_:result type Train
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search people 4
_:search type Train
_:search area centre
_:search category ?
_:search name ?
_:result amount over 40
_:result entrance_fee free
_:result name Cambridge Contemporary Art Museum
_:system inquired _:user
_:result address 6 Trinity Street
_:result phone 01223324222
_:search departure stevenage
_:search destination cambridge
_:result duration 49 minutes
_:search arrive_by 20:00
_:search day saturday
_:search leave_at dontcare
_:result arrive_by 18:43
_:result departure stevenage
_:result destination cambridge
_:result id TR2442
_:result leave_at 17:54
_:result type Train
_:system offered _:booking
_:search people 4
_:search type Train
_:booking category Train
_:booking ref NXSAEV12
_:booking type Booking