user_turns: <SILENCE> i need a vietnamese restaurant vietnamese no vietnamese food <SILENCE> whats the phone number whats the post code 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 kind of food would you like? You are looking for a restaurant serving any kind of food right? api_call vietnamese R_location R_price thanh_binh serves vietnamese food The phone number of thanh_binh is thanh_binh_phone The post code of thanh_binh is thanh_binh_post_code  you are welcome