user_turns: <SILENCE> expensive restaurant tuscan food <SILENCE> good bye <SILENCE> <SILENCE> 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 tuscan R_location expensive Sorry there is no tuscan restaurant in the expensive price range There are restaurants serving tuscan in the expensive price range . What area would you like? api_call thai R_location expensive Sorry there is no tuscan restaurant in the moderate price range  you are welcome