user_turns: <SILENCE> im looking for russian food in the center of town <SILENCE> how about british food <SILENCE> what is the address and phone number 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 british R_location R_price cotto is a nice restaurant in the centre of town serving british food The phone number of cotto is cotto_phone  you are welcome