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: Thanks. What is the postcode? Sentence2: Nothing more. Thank you. Sentence3: Are you wanting a specific department? Sentence4: You are very welcome. Please let us know if we can do anything else for you. Sentence5: Yes, please. I need the phone number for the children's surgical and medicine department. Sentence6: Their postcode is CB20QQ. Can I help you with anything else? Sentence7: I am looking for the Addenbrookes Hospital Sentence8: The phone number you need is 01223217450. Question: Who has spoken the sentence 3? (A) User (B) System
Output:
Answer: (B) System