inform((_:search,day,'wednesday');(_:search,departure,'peterborough');(_:search,type,'Train'))
user
Yes I 'm looking for a train that departs on Wednesday from Peterborough .
request((_:search,destination,?);(_:search,type,'Train'))
system
And where will the destination be ?
inform((_:search,destination,'cambridge');(_:search,type,'Train'))
user
I would like to go to Cambridge .
inform((_:result,count,'38');(_:result,type,'Train')) request((_:search,arrive_by,?);(_:search,leave_at,?);(_:search,type,'Train'))
system
There are 38 trains that can get you there , what time would you like to leave or arrive by ?
inform((_:search,leave_at,'13:00');(_:search,type,'Train'))
user
i want to leave after 13:00
inform((_:result,departure,'Peterborough');(_:result,id,'TR5003');(_:result,leave_at,'13:48');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
The TR5003 train leaves Peterborough at 13:48 . I can book you a seat on it if you 'd like .
request((_:result,duration,?);(_:result,ticket,?);(_:result,type,'Train'))
user
I do n't need a ticket right now , but could you tell me the travel time and price ?
inform((_:result,duration,'about 50 minutes');(_:result,ticket,'16.50');(_:result,type,'Train')) reqmore()
system
A single ticket costs 16.50 pounds and total travel time is about 50 minutes . Will that be all today ?
user
I changed my mind can you book that for me please ?
system
Your all set , the total fee is 16.5 GBP payable at the station . 
 Reference number is : EEJF27IZ .   Bye !
_:search day wednesday
_:search departure peterborough
_:search type Train
_:search day wednesday
_:search departure peterborough
_:search destination cambridge
_:search type Train
_:search day wednesday
_:search departure peterborough
_:search destination cambridge
_:result count 38
_:result type Train
_:search arrive_by ?
_:search leave_at 13:00
_:search type Train
_:search day wednesday
_:search departure peterborough
_:search destination cambridge
_:result count 38
_:search arrive_by ?
_:search leave_at 13:00
_:search type Train
_:result departure Peterborough
_:result id TR5003
_:result leave_at 13:48
_:result type Train
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:result duration ?
_:result ticket ?
_:search day wednesday
_:search departure peterborough
_:search destination cambridge
_:result count 38
_:search arrive_by ?
_:search leave_at 13:00
_:search type Train
_:result departure Peterborough
_:result id TR5003
_:result leave_at 13:48
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:result duration about 50 minutes
_:result ticket 16.50
_:result type Train
_:system inquired _:user