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: what is my event on this week ?
Example Output: user

Example Input: Delete my lunch for Wednesday.
Example Output: user

Example Input: Yes, but I also need you to remove Lynne and Andrea also.
Example Output:
user