System: 'Thank you for calling the Cambridge Information system. Your call will be recorded for research purposes. You may ask for information about a place to eat, such as a restaurant, a pub, or a cafe. How may I help you?'
User: 'im looking for a pub food restaurant and it should be in expensive price range'
System: 'Are you looking for a pub or a restaurant?'
User: 'pub'
System: 'There is no pub in the expensive price range.'
User: 'thank you good bye'
