inform((_:search,arrive_by,'14:00');(_:search,departure,'Boxbourne');(_:search,type,'Train'))
user
I 'm in need of a train leaving Boxbourne that ca n't arrive any later than 14:00 .   Can you find me one ?
request((_:search,arrive_by,?);(_:search,day,?);(_:search,leave_at,?);(_:search,type,'Train')) thank()
system
But of course . I just need a bit more info . What time do you want to leave and on what day ?
inform((_:search,arrive_by,'14:00');(_:search,day,'monday');(_:search,type,'Train'))
user
I want to leave on Monday . It does n't matter what time the train leaves as long as I arrive by 14:00 .
request((_:search,departure,?);(_:search,destination,?);(_:search,type,'Train'))
system
Just to confirm :   Is your destination Cambridge or another city ?
inform((_:search,departure,'Broxbourne');(_:search,destination,'cambridge');(_:search,type,'Train'))
user
Yes , my destination is Cambridge , and I 'll be coming in from Broxbourne .
request((_:search,day,?);(_:search,type,'Train'))
system
Okay , that helps give us a good start , what day are you wanting to travel ?
inform((_:search,day,'monday');(_:search,people,'6');(_:search,type,'Train'))
user
Monday , please . For 6 people .
inform((_:result,arrive_by,'13:32');(_:result,departure,'broxbourne');(_:result,destination,'cambridge');(_:result,leave_at,'12:32');(_:result,ticket,'17.90');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
It looks like there is a train leaving broxbourne at 12:32 and arriving in cambridge at 13:32 . The price is 17.90 pounds per passenger . Shall I book this for you ?
inform((_:search,people,'6');(_:search,type,'Train'))
user
Yes , please . I 'll need 6 tickets .
inform((_:booking,category,'Train');(_:booking,id,'TR0354');(_:booking,ref,'8UV8Y3A7');(_:booking,ticket,'107.4 GBP');(_:booking,type,'Booking'))
system
The Booking for TR0354 was successful , the total fee is 107.4 GBP payable at the station . 
 Reference number is : 8UV8Y3A7 .
thank()
user
Thank you so much . You have been very helpful !
system
You are very welcomed . Have a great day !
_:search arrive_by 14:00
_:search departure Boxbourne
_:search type Train
_:search departure Boxbourne
_:search leave_at ?
_:search arrive_by 14:00
_:search day monday
_:search type Train
_:search leave_at ?
_:search arrive_by 14:00
_:search day monday
_:search departure Broxbourne
_:search destination cambridge
_:search type Train
_:search leave_at ?
_:search arrive_by 14:00
_:search departure Broxbourne
_:search destination cambridge
_:search day monday
_:search people 6
_:search type Train
_:search leave_at ?
_:search arrive_by 14:00
_:search departure Broxbourne
_:search destination cambridge
_:search day monday
_:result arrive_by 13:32
_:result departure broxbourne
_:result destination cambridge
_:result leave_at 12:32
_:result ticket 17.90
_:result type Train
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search people 6
_:search type Train
_:search leave_at ?
_:search arrive_by 14:00
_:search departure Broxbourne
_:search destination cambridge
_:search day monday
_:result arrive_by 13:32
_:result departure broxbourne
_:result destination cambridge
_:result leave_at 12:32
_:result ticket 17.90
_:result type Train
_:system offered _:booking
_:search people 6
_:search type Train
_:booking category Train
_:booking id TR0354
_:booking ref 8UV8Y3A7
_:booking ticket 107.4 GBP
_:booking type Booking