user_turns: <SILENCE> i need a persian restaurant in the south part of town persian how about portuguese food <SILENCE> is that portuguese <SILENCE> alright whats 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 ? What kind of food would you like? I'm sorry but there is no restaurant serving persian food api_call R_cuisine south R_price peking_restaurant is a nice place in the south of town 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