user_turns: <SILENCE> christmas food indian food center <SILENCE> indian food <SILENCE> address 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 ? I am sorry but there is no christmas restaurant that matches your request There are restaurants serving christmas food . What area do you want? api_call christmas R_location R_price Sorry there is no christmas restaurant in the centre of town api_call indian R_location R_price kohinoor is a nice restaurant in the centre of town serving indian food Sure , kohinoor is on kohinoor_address  you are welcome