hello()
system
Hello , welcome to the Cambridge restaurant system? You can ask for restaurants by area , price range or food type . How may I help you?
inform((_:search,pricerange,'cheap');(_:search,type,'Restaurant'))
user
cheap restaurant
request((_:search,area,?);(_:search,type,'Restaurant'))
system
What part of town do you have in mind?
inform((_:search,area,*);(_:search,type,'Restaurant'))
user
dont care
request((_:search,food,?);(_:search,type,'Restaurant'))
system
What kind of food would you like?
inform((_:search,food,'barbeque');(_:search,type,'Restaurant'))
user
barbecue
_:system greeted _:user
_:search pricerange cheap
_:search type Restaurant
_:system greeted _:user
_:search pricerange cheap
_:search area *
_:search type Restaurant
_:system greeted _:user
_:search pricerange cheap
_:search area *
_:search food barbeque
_:search type Restaurant