inform((_:search,destination,'stevenage');(_:search,type,'Train'))
user
Looking for a train going Stevenage .
request((_:search,day,?);(_:search,departure,?);(_:search,type,'Train'))
system
Okay , for what day and where are you departing from ?
inform((_:search,day,'wednesday');(_:search,departure,'cambridge');(_:search,type,'Train'))
user
I am looking at traveling on Wednesday and departing from Cambridge .
request((_:search,leave_at,?);(_:search,type,'Train'))
system
Is there a particular time you would like to leave ?
inform((_:search,leave_at,'20:45');(_:search,type,'Train'))
user
I want to leave after 20:45 .
inform((_:result,arrive_by,'22:10');(_:result,id,'TR9016');(_:result,leave_at,'21:21');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
Train TR9016 leaves at 21:21 and arrives at 22:10 . Would that work ?
inform((_:search,people,'2');(_:search,type,'Train'))
user
Yes , I need a booking for 2 people please .
inform((_:booking,category,'Train');(_:booking,ref,'W20YWCTG');(_:booking,ticket,'25.6 GBP');(_:booking,type,'Booking'))
system
Booking was successful , the total fee is 25.6 GBP payable at the station . 
 Reference number is : W20YWCTG .
thank()
user
Thanks !   That is all I needed .
bye()
system
Our pleasure . Please call us again and have a terrific day .
bye()
user
You too , good bye now .
system
Thank you for contacting Cambridge TownInfo centre . Have a nice day !
_:search destination stevenage
_:search type Train
_:search destination stevenage
_:search day wednesday
_:search departure cambridge
_:search type Train
_:search destination stevenage
_:search day wednesday
_:search departure cambridge
_:search leave_at 20:45
_:search type Train
_:search destination stevenage
_:search day wednesday
_:search departure cambridge
_:search leave_at 20:45
_:result arrive_by 22:10
_:result id TR9016
_:result leave_at 21:21
_:result type Train
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search people 2
_:search type Train
_:search destination stevenage
_:search day wednesday
_:search departure cambridge
_:search leave_at 20:45
_:result arrive_by 22:10
_:result id TR9016
_:result leave_at 21:21
_:result type Train
_:system offered _:booking
_:search people 2
_:search type Train
_:booking category Train
_:booking ref W20YWCTG
_:booking ticket 25.6 GBP
_:booking type Booking
_:search destination stevenage
_:search day wednesday
_:search departure cambridge
_:search leave_at 20:45
_:result arrive_by 22:10
_:result id TR9016
_:result leave_at 21:21
_:result type Train
_:system offered _:booking
_:search people 2
_:search type Train
_:booking category Train
_:booking ref W20YWCTG
_:booking ticket 25.6 GBP
_:booking type Booking
_:system dismissed _:user
_:user dismissed _:system