In this task, you are given an utterance, which is a part of a conversation between a user and an agent. Your job is to detect the speaker. The user usually commands the agent to schedule events, retrieve event information, and check the schedule. While the agent's response is an answer to the user's questions or follow-up questions on the user's command. Answer with "User" or "Agent".

Q: Can you tell me what I have scheduled for this afternoon?

A: user
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Q: Setup an appointment at the doctor on Monday at 5pm

A: user
****
Q: thank you. Can you get me the chat ID

A:
user
****