user_turns: <SILENCE> expensive african food <SILENCE> phone number area what area thank you goodbye
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 Can I help you with anything else? bedouin is a nice place in the centre of town  you are welcome