user_turns: <SILENCE> <SILENCE> cheap restaurant yes thank you good bye 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 ? Sorry would you like something in the west or in the east Did you say you are looking for a restaurant in the west of town? What kind of food would you like? I'm sorry but there is no chinese restaurant in the west of town  you are welcome