user_turns: <SILENCE> <SILENCE> barbecue portuguese dont care any moderate cheap cheap portuguese food <SILENCE> phone number and address yawning thank you and 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 barbeque food There are restaurants serving portuguese food . What area do you want? There are restaurants serving portuguese food in any part of town . What price range would you like? Would you like something in the cheap , moderate , or expensive price range? I'm sorry but there is no restaurant serving moderate portuguese food Could you please repeat that? api_call portuguese R_location cheap nandos serves portuguese food in the cheap price range The phone number of nandos is nandos_phone  you are welcome