You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I'd like the phone number and postcode, please. Sentence2: Which department did you need? Sentence3: Just the general information. Sentence4: Your welcome, have a great day. Goodbye. Sentence5: Addenbrookes Hospital is on Hills Rd, Cambridge. Do you need the telephone number for a department or other service? Sentence6: THe main number of the hospital is 01223245151 and the postcode is CB20QQ. May i help with something else? Sentence7: Where is Addenbrookes Hospital located? Sentence8: No thanks, you were very helpful, have a nice day. Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User