user_turns: <SILENCE> world food gastropub gastropub gastropub of food no 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 ? I'm sorry but there is no restaurant serving world food Sorry would you like gastropub or world food? I'm sorry but there is no restaurant serving world food You are looking for a world restaurant right? I'm sorry but there is no restaurant serving world food  you are welcome