user_turns: <SILENCE> i want an expensive restaurant in the south part of town any <SILENCE> thank you
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 ? There are restaurants in the south of town . What type of food do you want? There are restaurants in the south of town serving any kind of food . What price range would you like? Would you like something in the cheap , moderate , or expensive price range?  you are welcome