user_turns: <SILENCE> im looking for vietnamese food <SILENCE> whats the price range whats the phone number what area is it in 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 vietnamese R_location R_price thanh_binh serves vietnamese food . thanh_binh is in the cheap price range The phone number of thanh_binh is thanh_binh_phone thanh_binh is a nice place in the west of town  you are welcome