user_turns: <SILENCE> portuguese food portuguese <SILENCE> address thank you goodbye
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 ? What kind of food 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