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: 'alright'
System: 'What kind of venue are you looking for? For example, a cafe, or a restaurant.'
User: 'seafood restaurant'
System: 'What part of town do you have in mind? For example, something in the Cherry Hinton, Girton, or Trumpington area.'
User: 'none'
System: 'Loch Fyne is an outstanding restaurant and it serves seafood.'
User: 'is it expensive'
System: 'Loch Fyne is in the expensive price range.'
User: 'what is the address'
System: 'Loch Fyne is on 37 Trumpington Street.'
User: 'what is the phone number'
System: 'The phone number of Loch Fyne is 01223902103.'
User: 'what is the price of the venue'
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: 'i want to find a northern european restaurant'
System: 'Are you looking for somewhere near a particular venue? For example, the Gallery at twelve A High Street, the Michaelhouse Centre, or Sidney Sussex College.'
User: 'background noise'
System: 'What kind of price range are you looking for? For example, expensive, or moderate.'
User: 'cheap'
System: 'Polonia is a great restaurant and it serves northern european food. It's in the cheap price range.'
User: 'what is the address'
System: 'Polonia is on 231 Chesterton Road.'
User: 'what is the phone number'
System: 'The phone number of Polonia is 01223902138.'
User: 'what is the postcode'
System: 'Polonia is in the area with the postcode CB4 1AS.'
User: 'thank you good bye'

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: 'im looking for a spanish restaurant in the cheap price range'
System: 'La Raza, which serves spanish food, is a great restaurant. It's in the cheap price range.'
User: 'um whats the address'
System: 'La Raza is on 4-6, The Basement, Rose Crescent. The price for main courses ranges from 1 pound 95 to 13 pounds 95 and the entrance for adults is 4 pounds.'
User: 'um whats the phone number'
System: 'The phone number of La Raza is 01223464550.'
User: 'what area is this restaurant in'
System: 'Yes. La Raza is a great restaurant.'
User: 'where is it located'
System: 'La Raza is on 4-6, The Basement, Rose Crescent.'
User: 'thank you good bye'

Example Output:
Cheap