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: 'yes im looking for a traditional restaurant in the expensive price range'
System: 'What part of town do you have in mind? For example, something in the Chesterton, central, or Romsey area.'
User: 'it doesnt matter'
System: 'The Royal Cambridge Hotel, which serves traditional food, is a great restaurant. It's in the expensive price range.'
User: 'ok can you get get me the address and post code'
System: 'The Royal Cambridge Hotel, which is in the area with the postcode CB2 1PY, is on Trumpington Street. A single room ranges from 91 pounds and to 98 pounds and a cheapest double room is 108 pounds and a family room ranges from 135 pounds and to 169 pounds and the price for main courses ranges from 12 pounds to 18 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 spanish restaurant with a cheap price range'
System: 'La Raza is an outstanding restaurant. It serves spanish food. It's in the cheap price range.'
User: 'what is the address'
System: 'La Raza is located 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: 'whats the phone number'
System: 'The phone number of La Raza is 01223464550.'
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: 'i am looking for an expensive restaurant and it should be in the romsey area'
System: 'The Backstreet Bistro is an outstanding restaurant. It's in the Romsey part of town. It's in the expensive price range.'
User: 'please provide address phone number and price'
System: 'The Backstreet Bistro is located on 2 Sturton Street and its phone number is 01223306306. The price for main courses ranges from 10 pounds 95 to 14 pounds 25.'
User: 'okay thank you goodbye'

Example Output:
Expensive