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? If you are still confused, see the following 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'

Solution: Moderate
Reason: The user mentions that they are looking for a moderately priced coffee shop.

Now, 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: 'restaurant mexican'
System: 'Are you looking for somewhere near a particular venue? For example, Jesus College, Lamma's Land, or the Whipple Museum of the History of Science.'
User: 'serve mexican food'
System: 'Nanna Mexico, which serves mexican and tex mex food, is a great restaurant.'
User: 'expensive price range'
System: 'Nanna Mexico is a great venue. The price for main courses ranges from 5 pounds 35 to 15 pounds 50 and the price for a cappuccino is 2 pounds 95.'
User: 'is it expensive'
System: 'Yes. Nanna Mexico is in the expensive price range.'
User: 'ok'
System: 'Nanna Mexico is a great restaurant, it serves mexican and tex mex food and it's in the expensive price range.'
User: 'and um the address'
System: 'Nanna Mexico is on 33 Regent Street.'
User: 'yes and the phone number'
System: 'The phone number of Nanna Mexico is 01223902150.'
User: 'thank you good bye'

Student:
Expensive