inform((_:search,day,'friday');(_:search,type,'Train'))
user
I need to what trains are leaving Friday evening .
request((_:search,departure,?);(_:search,type,'Train'))
system
Where are you looking to depart from ?
inform((_:search,departure,'peterborough');(_:search,type,'Train'))
user
I 'm leaving from Peterborough .
inform((_:result,amount,'two trains an hour');(_:result,departure,'peterborough');(_:result,type,'Train')) request((_:search,leave_at,?);(_:search,type,'Train'))
system
There are two trains an hour leaving peterborough all evening . Do you know what time you plan to leave ?
inform((_:search,arrive_by,'20:45');(_:search,type,'Train'))
user
Not really .   I want to get there by 20:45 though .
inform((_:result,arrive_by,'19:09');(_:result,departure,'Peterborough');(_:result,destination,'Cambridge');(_:result,id,'TR4182');(_:result,leave_at,'18:19');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
TR4182 leaves Peterborough at 18:19 and arrives in Cambridge at 19:09 . Will this work for you ?
request((_:result,ticket,?);(_:result,type,'Train'))
user
Yes , that 's perfect . What is the price ?
inform((_:result,ticket,'16.50 pounds');(_:result,type,'Train'))
system
The price is 16.50 pounds .
thank()
user
Thank you very much . That is all for today .
reqmore()
system
Are you certain you do n't need further assistance ?
thank()
user
Yes I am sure . Thank you .
system
You 're welcome .   Thank you for using the Cambridge TownInfo centre .   Goodbye .
_:search day friday
_:search type Train
_:search day friday
_:search departure peterborough
_:search type Train
_:search day friday
_:search departure peterborough
_:result amount two trains an hour
_:result departure peterborough
_:result type Train
_:search leave_at ?
_:search arrive_by 20:45
_:search type Train
_:search day friday
_:search departure peterborough
_:result amount two trains an hour
_:search leave_at ?
_:search arrive_by 20:45
_:search type Train
_:result arrive_by 19:09
_:result departure Peterborough
_:result destination Cambridge
_:result id TR4182
_:result leave_at 18:19
_:result type Train
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:result ticket ?
_:search day friday
_:search departure peterborough
_:result amount two trains an hour
_:search leave_at ?
_:search arrive_by 20:45
_:search type Train
_:result arrive_by 19:09
_:result departure Peterborough
_:result destination Cambridge
_:result id TR4182
_:result leave_at 18:19
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:result ticket 16.50 pounds
_:result type Train
_:search day friday
_:search departure peterborough
_:result amount two trains an hour
_:search leave_at ?
_:search arrive_by 20:45
_:search type Train
_:result arrive_by 19:09
_:result departure Peterborough
_:result destination Cambridge
_:result id TR4182
_:result leave_at 18:19
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:result ticket 16.50 pounds
_:result type Train
_:system inquired _:user