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: i think it should take 42 minutes to finish.
Example Output: user

Example Input: The 12 to 1 meeting time will work!
Example Output: user

Example Input: Do I have any days this week with nothing in my calendar?
Example Output:
user