Part 1. Definition
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.
Part 2. Example
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 moderately priced coffee shop'
System: 'Are you looking for somewhere near a particular venue? For example, Cambridge Contemporary Art, Great Saint Mary's Church, or Primavera.'
User: 'no im not'
System: 'Cafe Eleven, which is in the moderate price range, is an outstanding cafe.'
User: 'can i get the phone number and the postcode'
System: 'The phone number of Cafe Eleven is 01223369157. It's in the area with the postcode CB1 1DG.'
User: 'thank you goodbye'

Answer: Moderate
Explanation: The user mentions that they are looking for a moderately priced coffee shop.
Part 3. Exercise
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 going to be in the fen ditton area and im looking for a moderately priced uh restaurant'
System: 'Let me confirm. You are looking for an indian venue.'
User: 'um that doesnt have to be indian any anything that is moderately priced'
System: 'Let me confirm. You are looking for an indian venue.'
User: 'um cheap cheap venue not indian'
System: 'Let me confirm. You are looking for an indian venue.'
User: 'correct'
System: 'Let me confirm. You are looking for an indian venue.'
User: 'yes'
System: 'The Curry House, which serves indian food, is an outstanding restaurant. It's in the moderate price range.'
User: 'uh great do you have the um the phone number and address'
System: 'The Curry House is on 71 Castle Street and its phone number is 01223312569.'
User: 'and where is this located'
System: 'The Curry House is located on 71 Castle Street.'
User: 'thank you goodbye'

Answer:
Moderate