inform((_:search,food,'hungarian');(_:search,pricerange,'cheap');(_:search,type,'Restaurant'))
user
I want to find a cheap restaurant serving hungarian food .
request((_:search,area,?);(_:search,type,'Restaurant'))
system
What area would you like to look in ?
inform((_:search,area,'dontcare');(_:search,food,'hungarian');(_:search,pricerange,'cheap');(_:search,type,'Restaurant'))
user
I do not care about the area as long as it is hungarian food and cheap .
request((_:search,food,?);(_:search,type,'Restaurant')) canthelp((_:search,type,'Restaurant'))
system
There are no hungarian restaurants I can direct you to .   Would you like another type of food ?
inform((_:search,food,'modern european');(_:search,type,'Restaurant'))
user
Yes , how about a restaurant that serves modern european food ?
inform((_:result,food,'modern european');(_:result,name,'the river bar steakhouse and grill');(_:result,pricerange,'cheap');(_:result,type,'Restaurant'))
system
The the river bar steakhouse and grill is cheap and serves modern european food
request((_:result,address,?);(_:result,postcode,?);(_:result,type,'Restaurant'))
user
Can I get the address and postcode ?
reqmore() inform((_:result,address,'Quayside Off Bridge Street');(_:result,postcode,'8 A.Q.');(_:result,postcode,'C.B 5');(_:result,type,'Restaurant'))
system
Their address is Quayside Off Bridge Street and the postcode is C.B 5 , 8 A.Q. May I help you with anything else ?
thank()
user
That 's it , Thank you , goodbye
system
You 're welcome and good bye .
_:search food hungarian
_:search pricerange cheap
_:search type Restaurant
_:search area dontcare
_:search food hungarian
_:search pricerange cheap
_:search type Restaurant
_:search area dontcare
_:search pricerange cheap
_:system canthelp _:search/cd091db1
_:search/cd091db1 type Restaurant
_:search food modern european
_:search type Restaurant
_:search area dontcare
_:search pricerange cheap
_:system canthelp _:search/cd091db1
_:search/cd091db1 type Restaurant
_:search food modern european
_:search type Restaurant
_:result food modern european
_:result name the river bar steakhouse and grill
_:result pricerange cheap
_:result type Restaurant
_:result address ?
_:result postcode ?
_:search area dontcare
_:search pricerange cheap
_:system canthelp _:search/cd091db1
_:search/cd091db1 type Restaurant
_:search food modern european
_:search type Restaurant
_:result food modern european
_:result name the river bar steakhouse and grill
_:result pricerange cheap
_:system inquired _:user
_:result address Quayside Off Bridge Street
_:result postcode 8 A.Q.
_:result postcode C.B 5
_:result type Restaurant