inform((_:search,destination,'cambridge');(_:search,type,'Train'))
user
I 'm looking for a train going to cambridge please .
inform((_:result,day,'friday');(_:result,departure,'london kings');(_:result,id,'TR5219');(_:result,type,'Train'))
system
the train i d is TR5219 and it leaves london kings on friday
inform((_:search,departure,'broxbourne');(_:search,type,'Train'))
user
Does that depart from broxbourne station ?
inform((_:result,count,'133');(_:result,departure,'Broxbourne');(_:result,destination,'Cambridge');(_:result,type,'Train')) request((_:search,day,?);(_:search,type,'Train'))
system
Sorry . I need to narrow down the 133 trains from Broxbourne to Cambridge . First , what day do you want to leave ?
inform((_:search,day,'sunday');(_:search,type,'Train'))
user
I want to leave on sunday
request((_:search,leave_at,?);(_:search,type,'Train'))
system
Is there a certain time of day you would like to travel ?
inform((_:search,leave_at,'13:45');(_:search,type,'Train'))
user
I would prefer to leave after 13:45 please
inform((_:result,day,'Sunday');(_:result,departure,'Broxbourne');(_:result,id,'TR4813');(_:result,leave_at,'14:32');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
Alright , I have train TR4813 that leaves Sunday at 14:32 from Broxbourne . Will this work better for you ?
inform((_:search,destination,'cambridge');(_:search,type,'Train')) request((_:result,ticket,?);(_:result,type,'Train'))
user
Yes as long as it is going to cambridge that sounds fine .   I 'll need the price also please .
inform((_:result,ticket,'14.32 pounds');(_:result,type,'Train'))
system
The price is 14.32 pounds per person .
inform((_:search,day,'sunday');(_:search,leave_at,'14:32');(_:search,type,'Train'))
user
Thank you , I will buy a ticket for 14.32 pounds for train TR4813 leaving Sunday at 14:32 .
inform((_:booking,category,'Train');(_:booking,ref,'4YAT8PVP');(_:booking,ticket,'14.32 GBP');(_:booking,type,'Booking'))
system
Your booking was successful , the total fee is 14.32 GBP payable at the station . 
 Your reference number is 4YAT8PVP .
thank()
user
Thank you so much , have a wonderful day .
thank()
system
thanks for inquiring with us . have a nice day
thank()
user
I will do so ... and you too .
system
I 'm glad I could help you . Goodbye .
_:search destination cambridge
_:search type Train
_:search destination cambridge
_:result day friday
_:result departure london kings
_:result id TR5219
_:result type Train
_:search departure broxbourne
_:search type Train
_:search destination cambridge
_:result day friday
_:result id TR5219
_:search departure broxbourne
_:result count 133
_:result departure Broxbourne
_:result destination Cambridge
_:result type Train
_:search day sunday
_:search type Train
_:search destination cambridge
_:result day friday
_:result id TR5219
_:search departure broxbourne
_:result count 133
_:result departure Broxbourne
_:result destination Cambridge
_:result type Train
_:search day sunday
_:search leave_at 13:45
_:search type Train
_:search departure broxbourne
_:result count 133
_:result destination Cambridge
_:search day sunday
_:search leave_at 13:45
_:result day Sunday
_:result departure Broxbourne
_:result id TR4813
_:result leave_at 14:32
_:result type Train
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search destination cambridge
_:search type Train
_:result ticket ?
_:search departure broxbourne
_:result count 133
_:result destination Cambridge
_:result day Sunday
_:result departure Broxbourne
_:result id TR4813
_:result leave_at 14:32
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search destination cambridge
_:result ticket 14.32 pounds
_:result type Train
_:search day sunday
_:search leave_at 14:32
_:search type Train
_:search departure broxbourne
_:result count 133
_:result destination Cambridge
_:result day Sunday
_:result departure Broxbourne
_:result id TR4813
_:result leave_at 14:32
_:system offered _:booking
_:search destination cambridge
_:result ticket 14.32 pounds
_:result type Train
_:search day sunday
_:search leave_at 14:32
_:search type Train
_:booking category Train
_:booking ref 4YAT8PVP
_:booking ticket 14.32 GBP
_:booking type Booking
_:search departure broxbourne
_:result count 133
_:result destination Cambridge
_:result day Sunday
_:result departure Broxbourne
_:result id TR4813
_:result leave_at 14:32
_:system offered _:booking
_:search destination cambridge
_:result ticket 14.32 pounds
_:result type Train
_:search day sunday
_:search leave_at 14:32
_:search type Train
_:booking category Train
_:booking ref 4YAT8PVP
_:booking ticket 14.32 GBP
_:booking type Booking