user_turns: <SILENCE> im looking for a restaurant in the center of town that serves hello how about spanish food is there a restaurant in the center of town serving spanish 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 ? There are restaurants in the centre of town . What type of food do you want? You are looking for a halal restaurant right? I'm sorry but there is no restaurant serving halal food Could you please repeat that? I'm sorry but there is no restaurant serving canapes food  you are welcome