user_turns: <SILENCE> im looking for an expensive restaurant vietnamese <SILENCE> great whats the phone number and whats their post code and whats their price range what about expensive food how about north_american food <SILENCE> and whats their phone number north_american food and whats their 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 ? There are restaurants in the expensive price range . What type of food do you want? 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 thanh_binh is in the cheap price range I'm sorry but there is no restaurant serving expensive vietnamese food api_call R_cuisine R_location expensive michaelhouse_cafe is in the expensive price range You are looking for a vietnamese restaurant right? The phone number of michaelhouse_cafe is michaelhouse_cafe_phone The post code of michaelhouse_cafe is michaelhouse_cafe_post_code  you are welcome