inform((_:search,food,'international');(_:search,type,'Restaurant'))
user
I 'm looking for a restaurant that serves international food .
select((_:result,area,'centre');(_:result,area,'east');(_:result,type,'Restaurant')) inform((_:result,amount,'several');(_:result,food,'international');(_:result,type,'Restaurant'))
system
There are several restaurants serving international food .   Would you prefer one in the centre or east part of town ?
user
I do n't care .
system
There are three restaurants serving international food . What price range would you like ?
_:search food international
_:search type Restaurant
_:search food international
_:search type Restaurant
_:result area centre
_:result area east
_:result amount several
_:result food international
_:result type Restaurant