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: meeting with my mom
Example Output: user

Example Input: Schedule Paige for a meeting on Friday
Example Output: user

Example Input: I want to move my meeting with Greg back 1 hour, make a new meeting with Sam 2 hours after my meeting with Greg ends, and add 30 minutes after the meeting with Sam called Commute.
Example Output:
user