user_turns: <SILENCE> south part of town expensive <SILENCE> address phone number type of food 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 ? What kind of food would you like? api_call R_cuisine R_location expensive cocum is a great restaurant Sure , cocum is on cocum_address The phone number of cocum is cocum_phone cocum is a great restaurant  you are welcome