user_turns: <SILENCE> cheap restaurant <SILENCE> in the west part <SILENCE> is it cheap is it in the west part of town west part of town i dont care 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 ? api_call R_cuisine R_location cheap pizza_hut_city_centre is in the cheap price range api_call R_cuisine west cheap pizza_hut_city_centre is a great restaurant pizza_hut_city_centre is in the cheap price range pizza_hut_city_centre is a nice place in the centre of town What kind of food would you like? thanh_binh is a nice place in the west of town and the prices are cheap The phone number of thanh_binh is thanh_binh_phone  you are welcome