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 an expensive restaurant in the castle hill area'
System: 'What part of town do you have in mind? For example, something in the Cherry Hinton, Newnham, or Romsey area.'
User: 'ah castle hill area'
System: 'What type of food would you like? For example, Drinks and snacks only, Continental, or International.'
User: 'ah doesnt matter'
System: 'Let me confirm. You don't care about the food and you are looking for a venue.'
User: 'expensive restaurant'
System: 'Let me confirm. You don't care about the food and you are looking for a venue.'
User: 'yes venue'
System: 'Are you looking for somewhere near a particular venue? For example, the Book and Print Gallery, Christ's College, or Pembroke College.'
User: 'no'
System: 'Blue Spice, which is in the expensive price range, is a great restaurant.'
User: 'ah sounds good whats the price'
System: 'Blue Spice is an outstanding venue. The price for main courses ranges from 12 pounds 50 to 12 pounds 50.'
User: 'and whats the phone number'
System: 'The phone number of Blue Spice is 01223413337.'
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: 'sil'
System: 'What kind of venue are you looking for? For example, a pub, or a restaurant.'
User: 'expensive restaurant in trumpington area'
System: 'What type of food would you like? For example, pub, American, or Greek.'
User: 'expensive restaurant in trumpington area'
System: 'What type of food would you like? For example, Greek, Middleeastern, or Vegetarian.'
User: 'expensive restaurant in trumpington area'
System: 'What type of food would you like? For example, pub, English, or Italian.'
User: 'i dont care'
System: 'The Oak Bistro, which is in the Trumpington part of town, is a great restaurant.'
User: 'english'
System: 'The Oak Bistro is located on 6 Lensfield Road.'
User: 'whats the address'
System: 'The Oak Bistro is located on 6 Lensfield Road.'
User: 'whats the phone number'
System: 'The phone number of The Oak Bistro is 01223323361.'
User: 'th whats the phone number'
System: 'The phone number of The Oak Bistro is 01223323361.'
User: 'whats the price'
System: 'The Oak Bistro is a great venue. The price for main courses ranges from 11 pounds 50 to 17 pounds 75.'
User: 'thank you goodbye'

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 price range are you looking for? For example, cheap, expensive, or moderate.'
User: 'japanese restaurant'
System: 'Let me confirm. You are looking for a japanese venue.'
User: 'japanese restaurant'
System: 'What kind of price range are you looking for? For example, cheap, free, or moderate.'
User: 'moderate'
System: 'Are you looking for somewhere near a particular venue? For example, Castle Galleries, King's College, or Queens' College.'
User: 'i dont care'
System: 'Yippee Noodle Bar, which serves chinese take away and japanese food, is an outstanding restaurant. It's in the moderate price range.'
User: 'what is the address'
System: 'Yippee Noodle Bar is on 7-9 King Street.'
User: 'what is the price'
System: 'Yippee Noodle Bar is a great venue. The price for main courses ranges from 7 pounds 30 to 11 pounds 40.'
User: 'thank you good bye'

Example Output:
Moderate