user_turns: <SILENCE> im looking for a restaurant that serves swiss food what about vietnamese type of food no im looking for one that serves vietnamese food <SILENCE> can i have the address and 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 restaurant serving swiss food You are looking for a swiss restaurant right? api_call vietnamese R_location R_price thanh_binh serves vietnamese food The phone number of thanh_binh is thanh_binh_phone  you are welcome