user_turns: <SILENCE> im looking for a cheap restaurant world food portuguese food portuguese food i dont care <SILENCE> whats the address thank you good bye 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 cheap price range . What type of food do you want? I'm sorry but there is no restaurant serving welsh food Could you please repeat that? There are restaurants serving portuguese in the cheap price range . What area would you like? api_call portuguese R_location cheap nandos_city_centre serves portuguese food in the cheap price range Sure , nandos_city_centre is on nandos_city_centre_address nandos_city_centre is a great restaurant nandos serves portuguese food in the cheap price range  you are welcome