user_turns: <SILENCE> unusual unusual <SILENCE> expensive <SILENCE> 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 ? What kind of food would you like? api_call unusual R_location R_price graffiti is a great restaurant api_call R_cuisine R_location expensive The price range at graffiti is expensive . The phone number of graffiti is graffiti_phone  you are welcome