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: 'yes and mexican'
System: 'Would you like american or X food?'
User: 'restaurant'
System: 'Would you like american or X food?'
User: 'expensive price range'
System: 'Would you like american or X food?'
User: 'yes'
System: 'Would you like american or X food?'
User: 'mexican'
System: 'Are you looking for somewhere near a particular venue? For example, the Technology Museum, Christ's College, or the Lynne Strover Gallery.'
User: 'x food'
System: 'What part of town do you have in mind? For example, something in the Castle Hill, New Chesterton, or Trumpington area.'
User: 'uhm expensive price range'
System: 'Chiquito, which serves mexican and tex mex food, is an outstanding restaurant. It's in the expensive price range.'
User: 'trumpington area'
System: 'There is no restaurant in the Trumpington area and serving mexican and tex mex food.'
User: 'phone number'
System: 'The phone number of Chiquito is 01223400170. The price for main courses ranges from 7 pounds 95 to 15 pounds 95.'
User: 'phone number'
System: 'The phone number of Chiquito is 01223400170.'
User: 'and the address'
System: 'Chiquito is on Cambridge Leisure Park.'
User: 'and the address of the venue'
System: 'Chiquito is on Cambridge Leisure Park.'
User: 'thank you'
System: 'Chiquito is an outstanding restaurant.'
User: 'thank you good bye'

Student:
Expensive