user_turns: <SILENCE> i want to find a restaurant in the west part of town that serves vietnamese food <SILENCE> what is the phone number and what is the price range 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 west R_price thanh_binh is a nice restaurant in the west of town serving vietnamese food The phone number of thanh_binh is thanh_binh_phone thanh_binh is in the cheap price range  you are welcome