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: 'sil'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'a thai restaurant in a cheap price range'
System: 'What kind of venue are you looking for? For example, a cafe, or a restaurant.'
User: 'thai restaurant in the cheap price range'
System: 'The Milton Park English and Thai Restaurant, which serves thai food, is an outstanding restaurant. It's in the cheap price range.'
User: 'sil'
System: 'The Milton Park English and Thai Restaurant is an outstanding venue. The price for main courses ranges from 4 pounds 50 to 8 pounds 50.'
User: 'whats the address'
System: 'The Milton Park English and Thai Restaurant is on Milton Park Golf Course, Ely Road, Milton.'
User: 'whats the phone number'
System: 'The phone number of the Milton Park English and Thai Restaurant is 01223864602.'
User: 'what is the area'
System: 'The Milton Park English and Thai Restaurant is in the Fen Ditton part of town.'
User: 'thank you goodbye'

Example Output: Cheap

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: 'sil'
System: 'What kind of venue are you looking for? For example, a pub.'
User: 'restaurant'
System: 'Are you looking for somewhere near a particular venue? For example, Castle Galleries, the Museum of Classical Archaeology, or Sheep's Green.'
User: 'new chester new chesterton'
System: 'What kind of price range are you looking for? For example, cheap, expensive, or moderate.'
User: 'moderate'
System: 'Hakka, which is in the New Chesterton part of town, is a great restaurant. It's in the moderate price range.'
User: 'sil'
System: 'Are you looking for somewhere near a particular venue? For example, the Broughton House, Castle Galleries, or the Whipple Museum of the History of Science.'
User: 'repeat'
System: 'Are you looking for somewhere near a particular venue? For example, Emmanuel College, Gonville and Caius College, or the Whipple Museum of the History of Science.'
User: 'new chesterton'
System: 'Twenty-four is a great restaurant, it's in the Chesterton part of town and it's in the moderate price range.'
User: 'no'
System: 'Twenty-four, which is in the Chesterton part of town, is an outstanding restaurant. It's in the moderate price range.'
User: 'how much'
System: 'Twenty-four is an outstanding venue. The price for main courses ranges from 6 pounds to 15 pounds.'
User: 'sil'
System: 'Twenty-four is an outstanding restaurant.'
User: 'sil'
System: 'Twenty-four is a great restaurant.'
User: 'thank you goodbye'

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: 'unintelligible sil'
System: 'What kind of venue are you looking for? For example, a cafe, or a restaurant.'
User: 'unintelligible sil'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'im looking for a expensive pub food restaurant'
System: 'What type of food would you like? For example, American, Indian, or Japanese.'
User: 'restaurant with pub food'
System: 'Revolution is an outstanding restaurant. It serves pub food. It's in the expensive price range.'
User: 'pub food'
System: 'Revolution, which serves pub food, is an outstanding restaurant. It's in the expensive price range.'
User: 'may i have the address and area'
System: 'Revolution is located on 3-7 Downing Street.'
User: 'area'
System: 'Revolution is an outstanding restaurant.'
User: 'sil'
System: 'Revolution is a great restaurant.'
User: 'what area is the restaurant in'
System: 'Revolution is in the central part of town.'
User: 'in what area'
System: 'Revolution is in the central part of town.'
User: 'thank you and good bye'

Example Output:
Expensive