user_turns: <SILENCE> australian food yes cheap restaurant how about portuguese food portuguese food um give me the addresses any east <SILENCE> 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 ? You are looking for a australian restaurant right? I'm sorry but there is no restaurant serving australian food Could you please repeat that? There are restaurants serving portuguese in the cheap price range . What area would you like? What part of town do you have in mind? Sorry, I can't hear you api_call portuguese R_location cheap nandos serves portuguese food in the cheap price range Sure , nandos is on nandos_address  you are welcome