Task: Dialogue State Tracking
Input (English): 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: 'i want to find an expensive restaurant in the castlehill area'
System: 'What part of town do you have in mind? For example, something in the Chesterton, Romsey, or Trumpington area.'
User: 'the castlehill area'
System: 'What part of town do you have in mind? For example, something in the Barnwell, Chesterton, or Newnham area.'
User: 'castlehill areaif if'
System: 'Blue Spice, which is in the expensive price range, is a great restaurant.'
User: 'whats the phone number'
System: 'The phone number of Blue Spice is 01223413337.'
User: 'whats the post code'
System: 'Blue Spice is in the area with the postcode CB1 7DY.'
User: 'thank you goodbye'

Output (English): Expensive