user_turns: <SILENCE> im looking a cheap restaurant in the south part of town yes yes yes <SILENCE> could you give me a address uh no i need the phone number and okay and vietnamese food thank you <SILENCE> 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 ? There are restaurants in the cheap price range and the south of town . What type of food would you like? You are looking for a restaurant serving any kind of food right? You are looking for a vietnamese restaurant right? api_call R_cuisine R_location cheap thanh_binh serves vietnamese food in the cheap price range Sure , thanh_binh is on thanh_binh_address The phone number of thanh_binh is thanh_binh_phone api_call vietnamese R_location cheap thanh_binh is a great restaurant  you are welcome