user_turns: <SILENCE> i want an expensive restaurant that serves african food <SILENCE> whats the 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 african R_location expensive bedouin is a great restaurant serving african food and it is in the expensive price range The phone number of bedouin is bedouin_phone  you are welcome