inform((_:search,area,'centre');(_:search,type,'Attraction'))
user
I am looking for places to go in the centre of town .
request((_:search,category,?);(_:search,type,'Attraction'))
system
Sure , what are you interests ?
inform((_:search,category,'college');(_:search,type,'Attraction'))
user
I want to see a college .
inform((_:result,amount,'many');(_:result,category,'famous');(_:result,type,'Attraction'))
system
I have many famous ones to choose from . May I make a recommendation ?
request((_:result,entrance_fee,?);(_:result,type,'Attraction'))
user
Yes , please . I would prefer one with a low entrance fee .
inform((_:result,entrance_fee,'does not charge an entrance fee');(_:result,name,"christ 's college");(_:result,type,'Attraction'))
system
christ 's college does not charge an entrance fee . Would you like the address and phone number ?
request((_:result,postcode,?);(_:result,type,'Attraction'))
user
I just need the postcode please .
reqmore() inform((_:result,postcode,'cb23bu');(_:result,type,'Attraction'))
system
The postcode is cb23bu . Is there anything else I can help you with ?
inform((_:search,departure,'birmingham new street');(_:search,destination,'cambridge');(_:search,type,'Train'))
user
Yes , I am also looking for a train departing from birmingham new street to cambridge .
request((_:search,day,?);(_:search,leave_at,?);(_:search,type,'Train'))
system
Did you have a date or time in mind ?
inform((_:search,arrive_by,'08:30');(_:search,day,'wednesday');(_:search,leave_at,'none');(_:search,type,'Train'))
user
I 'd like to arrive by 08:30 on wednesday .
inform((_:result,leave_at,'8:40');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
I have one leaving at 8:40 will that work for you ?
inform((_:search,arrive_by,'08:30');(_:search,type,'Train'))
user
I need the train to arrive by 08:30 at the latest .
inform((_:result,arrive_by,'08:23');(_:result,leave_at,'05:40');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
There is one that leaves at 05:40 , and arrives by 08:23 . Would you like to book that train ?
user
No need to book , but can you tell me the cost of a ticket ?
inform((_:result,ticket,'75.10 pounds');(_:result,type,'Train'))
system
The cost for the ticket is 75.10 pounds
user
Great !   That is all I needed .
system
I 'm glad I could help ! Enjoy your day in Cambridge !
_:search area centre
_:search type Attraction
_:search area centre
_:search category college
_:search type Attraction
_:search area centre
_:search category college
_:search type Attraction
_:result amount many
_:result category famous
_:result type Attraction
_:result entrance_fee ?
_:search area centre
_:search category college
_:search type Attraction
_:result amount many
_:result category famous
_:result entrance_fee does not charge an entrance fee
_:result name christ 's college
_:result type Attraction
_:result postcode ?
_:search area centre
_:search category college
_:result amount many
_:result category famous
_:result entrance_fee does not charge an entrance fee
_:result name christ 's college
_:system inquired _:user
_:result postcode cb23bu
_:result type Attraction
_:search departure birmingham new street
_:search destination cambridge
_:search type Train
_:search area centre
_:search category college
_:result amount many
_:result category famous
_:result entrance_fee does not charge an entrance fee
_:result name christ 's college
_:system inquired _:user
_:result postcode cb23bu
_:result type Attraction
_:search departure birmingham new street
_:search destination cambridge
_:search arrive_by 08:30
_:search day wednesday
_:search leave_at none
_:search type Train
_:search area centre
_:search category college
_:result amount many
_:result category famous
_:result entrance_fee does not charge an entrance fee
_:result name christ 's college
_:system inquired _:user
_:result postcode cb23bu
_:search departure birmingham new street
_:search destination cambridge
_:search day wednesday
_:search leave_at none
_:result leave_at 8:40
_:result type Train
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search arrive_by 08:30
_:search type Train
_:search area centre
_:search category college
_:result amount many
_:result category famous
_:result entrance_fee does not charge an entrance fee
_:result name christ 's college
_:system inquired _:user
_:result postcode cb23bu
_:search departure birmingham new street
_:search destination cambridge
_:search day wednesday
_:search leave_at none
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search arrive_by 08:30
_:search type Train
_:result arrive_by 08:23
_:result leave_at 05:40
_:result type Train
_:search area centre
_:search category college
_:result amount many
_:result category famous
_:result entrance_fee does not charge an entrance fee
_:result name christ 's college
_:system inquired _:user
_:result postcode cb23bu
_:search departure birmingham new street
_:search destination cambridge
_:search day wednesday
_:search leave_at none
_:system offered _:booking
_:booking category Train
_:booking type Booking
_:search arrive_by 08:30
_:search type Train
_:result arrive_by 08:23
_:result leave_at 05:40
_:result ticket 75.10 pounds
_:result type Train