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.

Example 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: 'unintelligible'
System: 'What kind of venue are you looking for? For example, a cafe, or a pub.'
User: 'an expensive restaurant in the fen ditton area'
System: 'What kind of price range are you looking for? For example, cheap, or expensive.'
User: 'expensive'
System: 'The Riverside Restaurant, which is in the Fen Ditton part of town, is an outstanding restaurant. It's in the expensive price range.'
User: 'expensive'
System: 'The Riverside Restaurant, which is in the Fen Ditton part of town, is an outstanding restaurant. It's in the expensive price range.'
User: 'what is the address'
System: 'The Riverside Restaurant is located on Cambridge Regional College, Newmarket Road.'
User: 'what is the phone number'
System: 'The phone number of the Riverside Restaurant is 01223418997.'
User: 'what it the type of food of the venue'
System: 'The Riverside Restaurant serves contemporary food.'
User: 'thank you good bye'

Example Output: Expensive

Example 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: 'cheap'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'restaurant'
System: 'What kind of price range are you looking for? For example, free, or moderate.'
User: 'moderate'
System: 'What type of food would you like? For example, Cafe food, Chinese take away, or Turkish.'
User: 'japanese'
System: 'What part of town do you have in mind? For example, something in the Barnwell, Newnham, or Romsey area.'
User: 'in the romsey area'
System: 'Are you looking for somewhere near a particular venue? For example, Castle Galleries, Magdalene College, or Sidney Sussex College.'
User: 'sydney sussex collesge'
System: 'Are you looking for somewhere near a particular venue? For example, the Technology Museum, Gonville and Caius College, or King's College.'
User: 'the technology building'
System: 'Yippee Noodle Bar is a great restaurant, it serves chinese take away and japanese food and it's in the moderate price range.'
User: 'thank you good bye'

Example Output: Moderate

Example 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 an expensive coffee shop serving italian food'
System: 'Caffe Nero is a great cafe and it serves italian food. It's in the expensive price range.'
User: 'what is the phone number'
System: 'The phone number of Caffe Nero is 01223307728.'
User: 'what is the postcode'
System: 'Caffe Nero is in the area with the postcode CB2 3PA.'
User: 'thank you good bye'

Example Output:
Expensive