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: Actually, not that, I thought there was another one.
Example Output: user

Example Input: Make 3 more breakfast meetings for the next 3 Saturdays after that one.
Example Output: user

Example Input: Can you delete the lunch event on February 5 and replace it with a meeting for work?
Example Output:
user