user_turns: <SILENCE> portuguese food i dont care i dont care <SILENCE> address 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 serving portuguese food . What area do you want? There are restaurants serving portuguese food in any part of town . What price range would you like? api_call portuguese R_location R_price nandos_city_centre serves portuguese food Sure , nandos_city_centre is on nandos_city_centre_address  you are welcome