inform((_:search,area,'east');(_:search,pricerange,'expensive');(_:search,type,'Restaurant'))
user
I would like to find an expensive restaurant in the east part of town .
request((_:search,food,?);(_:search,type,'Restaurant'))
system
What type of food are you looking for ?
inform((_:search,food,'dontcare');(_:search,type,'Restaurant'))
user
I do n't care .
inform((_:result,area,'east');(_:result,food,'british');(_:result,name,'grafton hotel restaurant');(_:result,pricerange,'expensive');(_:result,type,'Restaurant'))
system
grafton hotel restaurant serves british food , in the expensive price range and in the east . would you like to know the address and   phone number ?
request((_:result,phone,?);(_:result,type,'Restaurant'))
user
Just the phone number is fine , please .
reqmore() inform((_:result,phone,'01223 241387');(_:result,type,'Restaurant'))
system
The phone number is 01223 241387 . Will that be all ?
bye()
user
That is all , thank you very much . Good bye .
system
Thank you for using the Cambridge system . Goodbye .
_:search area east
_:search pricerange expensive
_:search type Restaurant
_:search area east
_:search pricerange expensive
_:search food dontcare
_:search type Restaurant
_:search area east
_:search pricerange expensive
_:search food dontcare
_:search type Restaurant
_:result area east
_:result food british
_:result name grafton hotel restaurant
_:result pricerange expensive
_:result type Restaurant
_:result phone ?
_:search area east
_:search pricerange expensive
_:search food dontcare
_:search type Restaurant
_:result area east
_:result food british
_:result name grafton hotel restaurant
_:result pricerange expensive
_:system inquired _:user
_:result phone 01223 241387
_:result type Restaurant
_:user dismissed _:system