user_turns: <SILENCE> <SILENCE> i want christmas food no i want american food no how about american food what about american food 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 ? What part of town do you have in mind? I'm sorry but there is no restaurant serving christmas food Did you say you are looking for a restaurant in the north of town? You are looking for a christmas restaurant right? I'm sorry but there is no restaurant serving christmas food Did you say you are looking for a restaurant in the north of town?  you are welcome