user_turns: <SILENCE> portuguese portuguese <SILENCE> 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'm sorry but there is no restaurant serving belgian food 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