user_turns: <SILENCE> unusual food unusual european city center moderate 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 kind of food would you like? I'm sorry but there is no restaurant serving unusual food There are restaurants serving european food . What area do you want? There are restaurants serving european in the centre of town . What price range would you like? Would you like something in the cheap , moderate , or expensive price range?  you are welcome