user_turns: <SILENCE> im looking for a restaurant in the south part of town portuguese <SILENCE> and the phone number and the 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 in the south of town . What type of food do you want? 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 Sure , nandos is on nandos_address  you are welcome