inform((_:search,day,'thursday');(_:search,leave_at,'17:30');(_:search,type,'Train'))
user
I need a train that leaves after 17:30 on Thursday
request((_:search,departure,?);(_:search,destination,?);(_:search,type,'Train')) inform((_:result,day,'thursday');(_:result,type,'Train'))
system
Where are you leaving from and going on thursday ?
inform((_:search,departure,'london liverpool street');(_:search,destination,'cambridge');(_:search,type,'Train'))
user
I 'll be heading from London Liverpool Street to Cambridge .
inform((_:result,amount,'a number');(_:result,type,'Train')) request((_:search,arrive_by,?);(_:search,type,'Train'))
system
I 've got a number of options for you .   Did you have an arrival time in mind ?
inform((_:search,arrive_by,'dontcare');(_:search,type,'Train'))
user
No , I do not .
inform((_:result,id,'TR7360');(_:result,leave_at,'17:39');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
Okay the TR7360 leaves at 17:39 . Will that work ?
inform((_:search,people,'3');(_:search,type,'Train'))
user
Sure , book it for 3 people please .
inform((_:booking,category,'Train');(_:booking,ref,'N1C90WGA');(_:booking,ticket,'49.8 GBP');(_:booking,type,'Booking'))
system
Booking was successful , the total fee is 49.8 GBP payable at the station . 
 Reference number is : N1C90WGA .
inform((_:search,name,'college');(_:search,type,'Attraction'))
user
Could you recommend a college for me to visit while I 'm in town ?
inform((_:result,area,'Centre');(_:result,entrance_fee,'free');(_:result,name,"Christ 's College");(_:result,phone,'01223334900');(_:result,type,'Attraction'))
system
Christ 's College is in Centre . Admission is free . Phone 01223334900 .
thank()
user
Thank you so much that will be all , looking forward to Cambridge .
system
enjoy your time in cambridge
_:search day thursday
_:search leave_at 17:30
_:search type Train
_:search day thursday
_:search leave_at 17:30
_:result day thursday
_:result type Train
_:search departure london liverpool street
_:search destination cambridge
_:search type Train
_:search day thursday
_:search leave_at 17:30
_:result day thursday
_:search departure london liverpool street
_:search destination cambridge
_:result amount a number
_:result type Train
_:search arrive_by dontcare
_:search type Train
_:search day thursday
_:search leave_at 17:30
_:result day thursday
_:search departure london liverpool street
_:search destination cambridge
_:result amount a number
_:search arrive_by dontcare
_:result id TR7360
_:result leave_at 17:39
_:result type Train
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search people 3
_:search type Train
_:search day thursday
_:search leave_at 17:30
_:result day thursday
_:search departure london liverpool street
_:search destination cambridge
_:result amount a number
_:search arrive_by dontcare
_:result id TR7360
_:result leave_at 17:39
_:result type Train
_:system offered _:booking
_:search people 3
_:booking category Train
_:booking ref N1C90WGA
_:booking ticket 49.8 GBP
_:booking type Booking
_:search name college
_:search type Attraction
_:search day thursday
_:search leave_at 17:30
_:result day thursday
_:search departure london liverpool street
_:search destination cambridge
_:result amount a number
_:search arrive_by dontcare
_:result id TR7360
_:result leave_at 17:39
_:system offered _:booking
_:search people 3
_:booking category Train
_:booking ref N1C90WGA
_:booking ticket 49.8 GBP
_:booking type Booking
_:search name college
_:search type Attraction
_:result area Centre
_:result entrance_fee free
_:result name Christ 's College
_:result phone 01223334900
_:result type Attraction