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 greek restaurant and it should have an expensive price range'
System: 'The Varsity, which serves greek food, is an outstanding restaurant. It's in the expensive price range.'
User: 'sil'
System: 'Are you looking for somewhere near a particular venue? For example, the Folk Museum, the Michaelhouse Centre, or the Whipple Museum.'
User: 'what was that'
System: 'What part of town do you have in mind? For example, something in the Cherry Hinton, New Chesterton, or riverside area.'
User: 'no'
System: 'The Varsity, which serves greek food, is an outstanding restaurant. It's in the expensive price range.'
User: 'sil'
System: 'Are you looking for somewhere near a particular venue? For example, Great Saint Mary's Church, the People's Portraits Exhibition, or Williams Art and Antiques.'
User: 'uh what is the address and the area of the venue'
System: 'The Varsity is on 35 Saint Andrew's Street. The price for main courses ranges from 9 pounds 95 to 18 pounds 95.'
User: 'no'
System: 'The Varsity is an outstanding restaurant.'
User: 'what is the area and address of the place'
System: 'The Varsity, which is in the Girton part of town, is located on 35 Saint Andrew's Street. The price for main courses ranges from 9 pounds 95 to 18 pounds 95.'
User: 'sil'
System: 'The Varsity is a great restaurant.'
User: 'what is the address and the area of the venue'
System: 'The Varsity is located on 35 Saint Andrew's Street.'
User: 'what type of food does it serve'
System: 'The Varsity serves greek food.'
User: 'ok and where is the area uh that this is located'
System: 'The Varsity is on 35 Saint Andrew's Street and it's in the Girton part of town.'
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: 'im looking for a cheap restaurant in the girton area'
System: 'The Dojo Noodle Bar, which is in the Girton part of town, is an outstanding restaurant. It's in the cheap price range.'
User: 'what is the phone number'
System: 'The phone number of the Dojo Noodle Bar is 01223363471.'
User: 'what is the postcode'
System: 'The Dojo Noodle Bar is in the area with the postcode CB2 1RQ.'
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 cafe food restaurant'
System: 'What kind of price range are you looking for? For example, cheap, or free.'
User: 'doesnt matter'
System: 'Carringtons is a great cafe and an outstanding restaurant. It serves cafe food and english food.'
User: 'what is the address and area'
System: 'Carringtons is on 23 Market Street.'
User: 'noise sil'
System: 'Carringtons is an outstanding restaurant.'
User: 'what is the address'
System: 'Carringtons is on 23 Market Street.'
User: 'in what area is herrington'
System: 'Carringtons is in the central part of town.'
User: 'thank you good bye'

Example Output:
Don't Care

