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: 'background noise'
System: 'What kind of price range are you looking for? For example, cheap, free, or moderate.'
User: 'moderate'
System: 'What kind of venue are you looking for? For example, a cafe, or a restaurant.'
User: 'restaurant'
System: 'What type of food would you like? For example, Chinese take away, Indian, or Traditional.'
User: 'any'
System: 'Are you looking for somewhere near a particular venue? For example, Cambridge Contemporary Art, Holy Trinity Church, or the Ruskin Gallery.'
User: 'newnham'
System: 'The Red Bull is a great restaurant, it's in the Newnham part of town and it's in the moderate price range.'
User: 'ok'
System: 'Can I help you with anything else?'
User: 'no'
System: 'The Red Bull, which is in the Newnham part of town, is an outstanding restaurant. 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: 'uh ok'
System: 'Can I help you with anything else?'
User: 'im looking for a seafood restaurant in the expensive price range'
System: 'Loch Fyne is an outstanding restaurant, it serves seafood and it's in the expensive price range.'
User: 'whats the address phone number and price'
System: 'Loch Fyne is on 37 Trumpington Street and its phone number is 01223902103. The price for main courses ranges from 9 pounds to 20 pounds.'
User: 'background noise'
System: 'Loch Fyne is an outstanding restaurant.'
User: 'what is the address phone number and price'
System: 'Loch Fyne is located on 37 Trumpington Street and its phone number is 01223902103.'
User: 'what is the price'
System: 'Loch Fyne is an outstanding venue. The price for main courses ranges from 9 pounds to 20 pounds.'
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: 'background noise'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'i would like a cheap restaurant in the fen ditton area'
System: 'The Milton Park English and Thai Restaurant, which is in the Fen Ditton part of town, is a great restaurant. It's in the cheap price range.'
User: 'may i have the phone number and address'
System: 'The Milton Park English and Thai Restaurant is on Milton Park Golf Course, Ely Road, Milton and its phone number is 01223864602.'
User: 'thank you good bye'

Example Output:
Cheap