Teacher: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.
Teacher: Now, understand the problem? Solve this instance: 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, expensive, or moderate.'
User: 'background noise'
System: 'What kind of venue are you looking for? For example, a cafe, or a pub.'
User: 'background noise'
System: 'What kind of venue are you looking for? For example, a cafe, or a pub.'
User: 'cheap'
System: 'What kind of venue are you looking for? For example, a pub.'
User: 'chinese'
System: 'Are you looking for a cafe or a restaurant?'
User: 'chinese'
System: 'Are you looking for a cafe or a restaurant?'
User: 'restaurant'
System: 'Are you looking for somewhere near a particular venue? For example, Artworks, the Book and Print Gallery, or the Saint Barnabas Press Gallery.'
User: 'restaurant'
System: 'Are you looking for somewhere near a particular venue? For example, Cafe Jello, the Book and Print Gallery, or the Saint Barnabas Press Gallery.'
User: 'no'
System: 'HK Fusion, which serves chinese food, is a great restaurant. It's in the cheap price range.'
User: 'no'
System: 'HK Fusion, which serves chinese food, is an outstanding restaurant. It's in the cheap price range.'
User: 'background noise'
System: 'HK Fusion, which serves chinese food, is an outstanding restaurant. It's in the cheap price range.'
User: 'number'
System: 'The phone number of HK Fusion is 01223355909.'
User: 'number'
System: 'HK Fusion is an outstanding restaurant.'
User: 'address'
System: 'HK Fusion is on 21 Burleigh Street.'
User: 'address'
System: 'HK Fusion is located on 21 Burleigh Street.'
User: 'address'
System: 'HK Fusion is on 21 Burleigh Street.'
User: 'thank you good bye'

Student:
Cheap