user_turns: <SILENCE> im looking for bistro food in the center of town im looking for north_american food right <SILENCE> whats the phone number thank you good bye
system_turns: Hello , welcome to the Cambridge restaurant system . You can ask for restaurants by area , price range or food type . How may I help you ? I'm sorry but there is no restaurant serving bistro food You are looking for a north_american restaurant right? api_call north_american R_location R_price gourmet_burger_kitchen is a nice place in the centre of town serving tasty north_american food The phone number of gourmet_burger_kitchen is gourmet_burger_kitchen_phone  you are welcome