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: 'i want a english restaurant'
System: 'What kind of price range are you looking for? For example, cheap, or expensive.'
User: 'expensive'
System: 'Carringtons is a great cafe and an outstanding restaurant and it serves cafe food and english food.'
User: 'what is the address'
System: 'Carringtons is on 23 Market Street.'
User: 'what is the phone number'
System: 'The phone number of Carringtons is 01223361792.'
User: 'what is the postcode'
System: 'Carringtons is in the area with the postcode CB2 3NZ.'
User: 'thank you goodbye'

Student:
Expensive