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: 'sil'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'continental restaurant expensive'
System: 'Are you looking for somewhere near a particular venue? For example, All Saints Church, Hughes Hall, or Wandlebury Country Park.'
User: 'continental restaurant expensive range'
System: 'What part of town do you have in mind? For example, Newnham, or Trumpington.'
User: 'n no'
System: 'Are you looking for somewhere near a particular venue? For example, Cambridge Contemporary Art, Christ's College, or Queens' College.'
User: 'no particular venue'
System: 'Alimentum, which serves continental and french food, is a great restaurant. It's in the expensive price range.'
User: 'repeat name'
System: 'Alimentum is an outstanding venue. The price for main courses ranges from 17 pounds 50 to 21 pounds and the price for a glass of wine ranges from 6 pounds 50 to 10 pounds 50.'
User: 'thats expensive really expensive'
System: 'Alimentum, which serves continental and french food, is an outstanding restaurant. It's in the expensive price range.'
User: 'address'
System: 'Alimentum is on 152-154 Hills Road.'
User: 'phone number'
System: 'The phone number of Alimentum is 01223413000.'
User: 'post code'
System: 'Alimentum is in the area with the postcode CB2 8PB.'
User: 'thank you good bye'

Student:
Expensive