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: 'chinese restaurant'
System: 'What part of town do you have in mind? For example, Barnwell, or Trumpington.'
User: 'city center'
System: 'The Ugly Duckling, which is in the central part of town, is a great restaurant. It serves chinese food.'
User: 'whats the phone number'
System: 'The phone number of the Ugly Duckling is 01223358281.'
User: 'price'
System: 'The Ugly Duckling is a great venue. The price for main courses ranges from 6 pounds to 10 pounds.'
User: 'thank you good bye'
Question: 'Did the user ask for the phone number of the restaurant?'

Output (English): Yes