user_turns: <SILENCE> are there any that serves portuguese food are there any that serves portuguese food <SILENCE> can i have the phone number and the address 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 persian food api_call portuguese R_location R_price nandos is a nice place in the south of town serving tasty portuguese food The phone number of nandos is nandos_phone  you are welcome