inform((_:search,day,'friday');(_:search,departure,'cambridge');(_:search,type,'Train'))
user
I 'd like to find a train leaving on Friday to Cambridge .
inform((_:result,count,'1414');(_:result,destination,'cambridge');(_:result,type,'Train')) request((_:search,departure,?);(_:search,type,'Train'))
system
There are 1414 trains heading to cambridge do you have a location you 're leaving ?
inform((_:search,arrive_by,'13:15');(_:search,departure,'birmingham new street');(_:search,type,'Train'))
user
I will leave from Birmingham new street , and arrive by 13:15 if possible .
inform((_:result,arrive_by,'12:23');(_:result,destination,'Cambridge');(_:result,id,'TR0497');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
TR0497 arrives in Cambridge at 12:23 . Would you like to purchase tickets ?
inform((_:search,people,'4');(_:search,type,'Train'))
user
Yes please , book 4 tickets for me .
inform((_:booking,category,'Train');(_:booking,leave_at,'9:40');(_:booking,ref,'T610U5HK');(_:booking,ticket,'300.39 GBP');(_:booking,type,'Booking'))
system
Booked , reference number is T610U5HK . You pay 300.39 GBP at the station . Your train leaves at 9:40 .
thank()
user
Thank you very much .   It looks like i am all set .   Have a nice day .
system
It has been my pleasure . Please feel free to contact us again if you require any further assistance !
_:search day friday
_:search departure cambridge
_:search type Train
_:search day friday
_:result count 1414
_:result destination cambridge
_:result type Train
_:search arrive_by 13:15
_:search departure birmingham new street
_:search type Train
_:search day friday
_:result count 1414
_:search arrive_by 13:15
_:search departure birmingham new street
_:result arrive_by 12:23
_:result destination Cambridge
_:result id TR0497
_:result type Train
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search people 4
_:search type Train
_:search day friday
_:result count 1414
_:search arrive_by 13:15
_:search departure birmingham new street
_:result arrive_by 12:23
_:result destination Cambridge
_:result id TR0497
_:result type Train
_:system offered _:booking
_:search people 4
_:search type Train
_:booking category Train
_:booking leave_at 9:40
_:booking ref T610U5HK
_:booking ticket 300.39 GBP
_:booking type Booking