user_turns: <SILENCE> central inaudible cheap restaurant <SILENCE> <SILENCE> east <SILENCE> <SILENCE> address <SILENCE> goodbye
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 ? You are looking for a restaurant is that right? What kind of food would you like? api_call R_cuisine R_location cheap The price range at thanh_binh is cheap . api_call R_cuisine R_location cheap thanh_binh serves vietnamese food The price range at thanh_binh is cheap . Sure , thanh_binh is on thanh_binh_address The price range at thanh_binh is cheap .  you are welcome