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: That's good. What's the temperature there supposed to be?
Example Output: user

Example Input: I found 0 attendees who have declined "costume party".
Example Output: agent

Example Input: Please check my appointments for the day before and the day after then.
Example Output:
user