user_turns: <SILENCE> im looking for vietnamese food in the north part of town how about the west area yes yes <SILENCE> can i have the phone number please 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 ? I'm sorry but there is no vietnamese restaurant in the north of town Did you say you are looking for a restaurant in the west of town? You are looking for a vietnamese restaurant right? api_call vietnamese west R_price thanh_binh is a nice place in the west of town serving tasty vietnamese food The phone number of thanh_binh is thanh_binh_phone  you are welcome