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: Add a team meeting on Tuesday at 3:00 PM.
Example Output: user

Example Input: I've put that on your calendar. __BREAK Does one of these work?
Example Output: agent

Example Input: No, please make it next Friday November 29th.
Example Output:
user