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: 'id like a thai restaurant'
System: 'What kind of price range are you looking for? For example, cheap, or moderate.'
User: 'expensive'
System: 'What part of town do you have in mind? For example, something in the Fen Ditton, King's Hedges, or Newnham area.'
User: 'sil'
System: 'What part of town do you have in mind? For example, Cherry Hinton, or Trumpington.'
User: 'i dont care'
System: 'The Wrestlers is an outstanding restaurant, it serves thai food and it's in the expensive price range.'
User: 'what is the phone number'
System: 'The phone number of The Wrestlers is 01223566554.'
User: 'whats the area'
System: 'The Wrestlers is in the riverside part of town.'
User: 'thank you good bye'
Question: 'Did the user ask for the phone number of the restaurant?'

Output (English): Yes