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".

Example Input: What are my appointments today?
Example Output: user

Example Input: I found 1 matching event on your calendar. It's your "hope the floors are done so I can move in finally" on Friday from 10:00 to 10:30 AM.
Example Output: agent

Example Input: I've changed "Meeting with Sarah and Damon Straeter" to be on Wednesday the 18th.
Example Output:
agent