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: 'breathing sil'
System: 'What part of town do you have in mind? For example, something in the Arbury, New Chesterton, or Trumpington area.'
User: 'an expensive mexican restaurant'
System: 'Nanna Mexico is an outstanding restaurant, it serves mexican and tex mex food and it's in the expensive price range.'
User: 'anywhere breathing'
System: 'What part of town do you have in mind? For example, something in the Barnwell, King's Hedges, or Newnham area.'
User: 'breathing sil'
System: 'Nanna Mexico, which serves mexican and tex mex food, is an outstanding restaurant. It's in the expensive price range.'
User: 'breathing sil'
System: 'Nanna Mexico, which serves mexican and tex mex food, is a great restaurant. It's in the expensive price range.'
User: 'breathing sil'
System: 'Nanna Mexico is a great restaurant. It serves mexican and tex mex food. It's in the expensive price range.'
User: 'breathing what is the address'
System: 'Nanna Mexico is near Downing College located on 33 Regent Street.'
User: 'breathing sil'
System: 'Nanna Mexico is an outstanding restaurant.'
User: 'breathing what is the address'
System: 'Nanna Mexico is on 33 Regent Street.'
User: 'what is the phone number'
System: 'The phone number of Nanna Mexico is 01223902150.'
User: 'breathing what is the phone number'
System: 'The phone number of Nanna Mexico is 01223902150.'
User: 'what is the post code'
System: 'Nanna Mexico is in the area with the postcode CB2 1AB.'
User: 'post code'
System: 'Nanna Mexico is in the area with the postcode CB2 1AB.'
User: 'breathing sil'
System: 'Nanna Mexico is an outstanding restaurant.'
User: 'breathing sil'
System: 'Nanna Mexico is a great restaurant.'
User: 'what is the post code'
System: 'Nanna Mexico is in the area with the postcode CB2 1AB.'
User: 'good bye breathing'

Student:
Expensive