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: 'restaurant'
System: 'What part of town do you have in mind? For example, Cherry Hinton, or New Chesterton.'
User: 'breathing sil'
System: 'What type of food would you like? For example, Greek, Italian, or Japanese.'
User: 'breathing sil'
System: 'What type of food would you like? For example, Northern european, Continental, or Japanese.'
User: 'american'
System: 'What part of town do you have in mind? For example, something in the Cherry Hinton, central, or Girton area.'
User: 'dont care'
System: 'Gourmet Burger , which serves american food, is a great restaurant.'
User: 'breathing sil'
System: 'Are you looking for somewhere near a particular venue? For example, Great Saint Mary's Church, or King's College.'
User: 'breathing sil'
System: 'Are you looking for somewhere near a particular venue? For example, the Gallery at twelve A High Street, Gonville and Caius College, or the People's Portraits Exhibition.'
User: 'no'
System: 'Gourmet Burger  is an outstanding restaurant and it serves american food.'
User: 'cheap'
System: 'Gourmet Burger  is an outstanding restaurant, it serves american food and it's in the cheap price range.'
User: 'breathing cheap'
System: 'Gourmet Burger  is a great restaurant. It serves american food. It's in the cheap price range.'
User: 'phone number and area'
System: 'The phone number of Gourmet Burger  is 01223312598.'
User: 'area'
System: 'Gourmet Burger  is an outstanding restaurant.'
User: 'area'
System: 'Gourmet Burger  is a great restaurant.'
User: 'area'
System: 'Gourmet Burger  is a great restaurant.'
User: 'what area'
System: 'Gourmet Burger  is in the central part of town.'
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 coffee shop that serves italian food'
System: 'What kind of price range are you looking for? For example, cheap, or expensive.'
User: 'i dont care'
System: 'Are you looking for somewhere near a particular venue? For example, Kettle's Yard, Old Schools, or Saint Catharine's College.'
User: 'no'
System: 'Caffe Nero, which serves italian food, is an outstanding cafe.'
User: 'what is the address'
System: 'Caffe Nero is on 11 Market Street.'
User: 'what is the price'
System: 'Caffe Nero is an outstanding venue. The price for main courses ranges from 3 pounds 50 to 3 pounds 85 and the price for a cappuccino is 2 pounds 15.'
User: 'thank you good bye'

Example Output: 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: 'ah hi ah i am looking for a thia restaurant'
System: 'Would you like thai or X food?'
User: 'and it should be in the expensive price range'
System: 'Would you like thai or X food?'
User: 'a thai food'
System: 'Are you looking for somewhere near a particular venue? For example, King's College, the Museum of Archaelogy and Anthropology, or Wandlebury Country Park.'
User: 'im looking for a thai restaurant'
System: 'Are you looking for somewhere near a particular venue? For example, the Gallery at twelve A High Street, Jesus College, or Sheep's Green.'
User: 'a country park'
System: 'Can I help you with anything else?'
User: 'unintelligible college'
System: 'Can I help you with anything else?'
User: 'ah im looking for a thai restaurant'
System: 'Are you looking for somewhere near a particular venue? For example, Milton Country Park, Lamma's Land, or Trinity College.'
User: 'im looking for a thai restaurant'
System: 'What part of town do you have in mind? For example, something in the Castle Hill, Chesterton, or riverside area.'
User: 'ah in the trinity college'
System: 'Are you looking for somewhere near a particular venue? For example, the Folk Museum, Kettle's Yard, or the People's Portraits Exhibition.'
User: 'a castle hill'
System: 'Are you looking for somewhere near a particular venue? For example, Cherry Hinton Water Play, Saint Catharine's College, or Williams Art and Antiques.'
User: 'thank you good bye'

Example Output:
Expensive