Definition: The input is a conversation between an automated system and a user looking for suggestions for pubs, restaurants and coffee shops in Cambridge. In the dialogue, the user may provide some criteria for the type of place they want such as price range, cuisine, etc. Given such a dialogue, output the price range the user if looking for which can take one of four values: Cheap, Moderate, Expensive and Don't Care. Output cannot be any other value than the four values. Note that if the user asks for the prices of items provided at a pub, restaurant or coffee shop but doesn't mention the price range they are looking for then the correct classification will be Don't Care. If the user does not mention a particular price, the correct classification will be Don't Care.
Input: 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'
System: 'What kind of price range are you looking for? For example, cheap, expensive, or moderate.'
User: 'i want to find a cheap restaurant and it should be'
System: 'What part of town do you have in mind? For example, Cherry Hinton, or Chesterton.'
User: 'a cheap restaurant in the fenditton area'
System: 'What part of town do you have in mind? For example, something in the Cherry Hinton, Chesterton, or Fen Ditton area.'
User: 'unintelligible fenditton area'
System: 'What part of town do you have in mind? For example, something in the Cherry Hinton, Chesterton, or riverside area.'
User: 'something in the fenditton area'
System: 'What part of town do you have in mind? For example, New Chesterton, or Newnham.'
User: 'fenditton area'
System: 'What part of town do you have in mind? For example, something in the Castle Hill, New Chesterton, or Newnham area.'
User: 'fenditton'
System: 'What part of town do you have in mind? For example, something in the central, Fen Ditton, or Newnham area.'
User: 'fenditton'
System: 'Are you looking for a pub or a restaurant?'
User: 'i want to find a cheap restaurant and it should be in the fenditton area'
System: 'The Milton Park English and Thai Restaurant is a great restaurant. It's in the Fen Ditton part of town. It's in the cheap price range.'
User: 'ok can i have the phone number and the price of the venue'
System: 'The Milton Park English and Thai Restaurant is on Milton Park Golf Course, Ely Road, Milton, it serves thai food and its phone number is 01223864602. The price for main courses ranges from 4 pounds 50 to 8 pounds 50.'
User: 'thank you good bye'

Output:
Cheap