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: No, I didn't find any events between December 1st and February 29, 2020.
Example Output: agent

Example Input: Alright, do I have any events set up with Kim Possible?
Example Output: user

Example Input: I found one event with Audrey next week. It's "Pool Party" on Tuesday the 20th from 3:00 to 3:30 PM.
Example Output:
agent