user_turns: <SILENCE> north um italian italian type of food yes 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 ? What kind of food would you like? I'm sorry but there is no restaurant serving greek food Did you say you are looking for a restaurant in the north of town? I'm sorry but there is no restaurant serving greek food  you are welcome