inform((_:search,departure,'peterborough');(_:search,destination,'cambridge');(_:search,type,'Train'))
user
i am looking for a train . The train should depart from Peterborough and should go to Cambridge .
inform((_:result,amount,'many');(_:result,type,'Train')) request((_:search,day,?);(_:search,leave_at,?);(_:search,type,'Train'))
system
There are many trains available .   Do you have a specific day or time in mind ?
inform((_:search,day,'sunday');(_:search,type,'Train'))
user
I would like to travel on Sunday .
inform((_:result,day,'sunday');(_:result,type,'Train')) request((_:search,arrive_by,?);(_:search,leave_at,?);(_:search,type,'Train'))
system
Great , and what time on sunday would you like to either leave after or arrive by ?
inform((_:search,leave_at,'17:15');(_:search,type,'Train'))
user
I need to leave after 17:15 .
offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
can i book for you ?
inform((_:search,people,'2');(_:search,type,'Train'))
user
Yes I need it booked for 2 people .
reqmore() inform((_:booking,category,'Train');(_:booking,ref,'CW3O4QG9');(_:booking,ticket,'26.4 GBP');(_:booking,type,'Booking'))
system
The total fee is 26.4 GBP payable at the station . 
 Reference number is : CW3O4QG9 . Is there anything else I can assist you with ?
thank()
user
No that would be it thank you very much .
system
You 're welcome . Have an amazing trip !
_:search departure peterborough
_:search destination cambridge
_:search type Train
_:search departure peterborough
_:search destination cambridge
_:result amount many
_:result type Train
_:search leave_at ?
_:search day sunday
_:search type Train
_:search departure peterborough
_:search destination cambridge
_:result amount many
_:search day sunday
_:result day sunday
_:result type Train
_:search arrive_by ?
_:search leave_at 17:15
_:search type Train
_:search departure peterborough
_:search destination cambridge
_:result amount many
_:search day sunday
_:result day sunday
_:result type Train
_:search arrive_by ?
_:search leave_at 17:15
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search people 2
_:search type Train
_:search departure peterborough
_:search destination cambridge
_:result amount many
_:search day sunday
_:result day sunday
_:result type Train
_:search arrive_by ?
_:search leave_at 17:15
_:system offered _:booking
_:search people 2
_:search type Train
_:system inquired _:user
_:booking category Train
_:booking ref CW3O4QG9
_:booking ticket 26.4 GBP
_:booking type Booking