user_turns: <SILENCE> im looking for a restaurant in the center serving russian food <SILENCE> iam looking for a restaurant that serves portuguese food <SILENCE> what is the address phone number and price range what is the price range 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 ? api_call russian R_location R_price Sorry there is no russian restaurant in the centre of town api_call portuguese R_location R_price nandos_city_centre is a nice restaurant in the centre of town serving portuguese food The phone number of nandos_city_centre is nandos_city_centre_phone nandos_city_centre is in the cheap price range  you are welcome