inform((_:search,food,'vegetarian');(_:search,type,'Restaurant'))
user
I need a vegetarian restaurant
request((_:search,area,?);(_:search,type,'Restaurant'))
system
What area would you like ?
inform((_:search,area,'east');(_:search,type,'Restaurant'))
user
East part of town .
canthelp((_:search,type,'Restaurant')) inform((_:result,area,'east');(_:result,food,'vegetarian');(_:result,type,'Restaurant'))
system
I 'm sorry , there are no vegetarian restaurants in the east part of town .
inform((_:search,area,'east');(_:search,food,'indian');(_:search,type,'Restaurant'))
user
Is there an indian restaurant in the east part of town ?
system
Yes , there are four Indian restaurants in the east part of town . What price range would you like ?
_:search food vegetarian
_:search type Restaurant
_:search food vegetarian
_:search area east
_:search type Restaurant
_:system canthelp _:search/c9edb968
_:search/c9edb968 type Restaurant
_:result area east
_:result food vegetarian
_:result type Restaurant
_:search area east
_:search food indian
_:search type Restaurant