user_turns: <SILENCE> cheap portugeuse any area <SILENCE> address phone number and area area 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 ? There are restaurants serving portuguese in the cheap price range . What area would you like? api_call R_cuisine R_location cheap nandos serves portuguese food in the cheap price range Sure , nandos is on nandos_address The phone number of nandos is nandos_phone nandos is a nice place in the south of town  you are welcome