user_turns: <SILENCE> <SILENCE> cheap resataurant serving food yes <SILENCE> food food food food cheap food cheap restaurant serving unintellgible food how about vietnamese food how about vietnamese food yes yes <SILENCE> what is 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 ? What part of town do you have in mind? Let me confirm , You are looking for a restaurant in the cheap price range right? api_call R_cuisine R_location cheap charlie_chan is in the cheap price range I'm sorry but there is no restaurant serving cheap korean food Let me confirm , You are looking for a restaurant in the cheap price range right? I'm sorry but there is no restaurant serving cheap korean food Let me confirm , You are looking for a restaurant in the cheap price range right? I'm sorry but there is no restaurant serving cheap korean food You are looking for a korean restaurant right? I'm sorry but there is no restaurant serving cheap korean food You are looking for a vietnamese restaurant right? Let me confirm , You are looking for a restaurant in the cheap price range right? api_call vietnamese R_location cheap thanh_binh serves vietnamese food in the cheap price range The phone number of thanh_binh is thanh_binh_phone  you are welcome