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: At the end of my day on Sunday schedule Cook for the Week.
Example Output: user

Example Input: It will be clear with a high of 0.00 °F and a low of 0.00 °F today.
Example Output: agent

Example Input: Add brainstorming meeting to the calendar for next Monday morning.
Example Output:
user