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: Thank you, Goodbye. Sentence2: You're welcome. Have a great day! Sentence3: What is the closest police station to my current location? Sentence4: Closest police station is in Parkside, Cambridge, CB11JG Question: Who has spoken the sentence 2? (A) User (B) System
Output:
Answer: (A) User