inform((_:search,day,'tuesday');(_:search,departure,'cambridge');(_:search,type,'Train'))
user
I need a train that leaves on tuesday and should depart from cambridge .
request((_:search,destination,?);(_:search,type,'Train')) inform((_:result,amount,'many');(_:result,day,'Tuesday');(_:result,departure,'Cambridge');(_:result,type,'Train'))
system
I 'm finding many trains departing from Cambridge on Tuesday . What is your destination ?
inform((_:search,arrive_by,'13:30');(_:search,destination,'peterborough');(_:search,type,'Train'))
user
I am going to Peterborough and want to arrive by 13:30 .
inform((_:result,arrive_by,'13:24');(_:result,day,'Tuesday');(_:result,departure,'Cambridge');(_:result,destination,'Peterborough');(_:result,leave_at,'12:34');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
I have a train that departs Cambridge on Tuesday at 12:34 and will get you to Peterborough at 13:24 exactly . Would you like me to book that seat for you ?
inform((_:search,people,'6');(_:search,type,'Train'))
user
Yes , please ! I need 6 seats .
inform((_:booking,category,'Train');(_:booking,ref,'NH7GXPVA');(_:booking,ticket,'99 GBP');(_:booking,type,'Booking'))
system
Booking was successful , the total fee is 99 GBP payable at the station . 
 Reference number is : NH7GXPVA .
thank()
user
Thank you so much , that 's all I need today .
system
Okay great . I 'm glad I was able to help you .
_:search day tuesday
_:search departure cambridge
_:search type Train
_:search day tuesday
_:search departure cambridge
_:result amount many
_:result day Tuesday
_:result departure Cambridge
_:result type Train
_:search arrive_by 13:30
_:search destination peterborough
_:search type Train
_:search day tuesday
_:search departure cambridge
_:result amount many
_:search arrive_by 13:30
_:search destination peterborough
_:result arrive_by 13:24
_:result day Tuesday
_:result departure Cambridge
_:result destination Peterborough
_:result leave_at 12:34
_:result type Train
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search people 6
_:search type Train
_:search day tuesday
_:search departure cambridge
_:result amount many
_:search arrive_by 13:30
_:search destination peterborough
_:result arrive_by 13:24
_:result day Tuesday
_:result departure Cambridge
_:result destination Peterborough
_:result leave_at 12:34
_:result type Train
_:system offered _:booking
_:search people 6
_:search type Train
_:booking category Train
_:booking ref NH7GXPVA
_:booking ticket 99 GBP
_:booking type Booking