user_turns: <SILENCE> world food any price range <SILENCE> <SILENCE> portuguese food <SILENCE> the phone number 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 ? I am sorry but there is no world restaurant that matches your request You are looking for a restaurant is that right? I am sorry but there is no world restaurant that matches your request api_call portuguese R_location R_price nandos serves portuguese food . The phone number of nandos is nandos_phone Sure , nandos is on nandos_address  you are welcome