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: 'im looking for a cheap restaurant and it should be in the girton area'
System: 'The Dojo Noodle Bar, which is in the Girton part of town, is a great restaurant. It's in the cheap price range.'
User: 'what is the address and the postcode of the place'
System: 'The Dojo Noodle Bar, which is in the area with the postcode CB2 1RQ, is on Miller's Yard.'
User: 'whats the address'
System: 'The Dojo Noodle Bar is located on Miller's Yard.'
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: 'i need a mexican texmex restaurant'
System: 'What kind of price range are you looking for? For example, cheap, free, or moderate.'
User: 'expensive price range'
System: 'What kind of price range are you looking for? For example, cheap, or expensive.'
User: 'expensive'
System: 'What kind of price range are you looking for? For example, cheap, or expensive.'
User: 'expensive'
System: 'Are you looking for somewhere near a particular venue? For example, the Book and Print Gallery, Corpus Christi, or Magdalene College.'
User: 'no'
System: 'Nanna Mexico is an outstanding restaurant and it serves mexican and tex mex food. It's in the expensive price range.'
User: 'i do need the address though'
System: 'Nanna Mexico is located on 33 Regent Street. The price for main courses ranges from 5 pounds 35 to 15 pounds 50 and the price for a cappuccino is 2 pounds 95.'
User: 'what is the phone number'
System: 'The phone number of Nanna Mexico is 01223902150.'
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: 'nosie sil'
System: 'What kind of venue are you looking for? For example, a pub, or a restaurant.'
User: 'restaurant'
System: 'What kind of price range are you looking for? For example, free, or moderate.'
User: 'expensive price range'
System: 'Are you looking for somewhere near a particular venue? For example, Jesus College, Little Saint Mary's, or Wandlebury Country Park.'
User: 'no no special price'
System: 'What type of food would you like? For example, Drinks and snacks only, French, or Thai.'
User: 'italian'
System: 'What part of town do you have in mind? For example, Girton, or Trumpington.'
User: 'it doesnt matter'
System: 'Ask is a great restaurant and it serves italian food. It's in the expensive price range.'
User: 'noise sil'
System: 'Ask is a great venue. The price for main courses ranges from 6 pounds 25 to 11 pounds 95 and the price for a glass of wine ranges from 4 pounds 85 to 6 pounds 5.'
User: 'is this an italian restaurant'
System: 'Ask is an outstanding restaurant and it serves italian food.'
User: 'do you have any others in the expensive price range'
System: 'Ask is located on 12 Bridge Street. The price for main courses ranges from 6 pounds 25 to 11 pounds 95 and the price for a glass of wine ranges from 4 pounds 85 to 6 pounds 5.'
User: 'do you have any others'
System: 'The Sorrento is a great restaurant. It serves italian food. It's in the expensive price range.'
User: 'may i have the address'
System: 'The Sorrento is on 196 Cherry Hinton Road.'
User: 'an what is the post code'
System: 'The Sorrento is in the area with the postcode CB1 7AN.'
User: 'do you have any other italian restaurants in the expensive price range'
System: 'The Sorrento is an outstanding venue. The price for main courses ranges from 9 pounds to 16 pounds 95.'
User: 'do you have any others'
System: 'The Sorrento is located on 196 Cherry Hinton Road.'
User: 'clicking sil'
System: 'The Sorrento is a great restaurant.'
User: 'breathing sil'
System: 'The Sorrento is a great restaurant.'
User: 'thank you good bye'

Example Output:
Expensive