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".

Input: Consider Input: Yes, I found one event not matching "Training" on Thursday the 23rd. It's "Biz prep" from 8:00 to 8:30 AM.

Output: agent


Input: Consider Input: Update convention to make it 4 hours long.

Output: user


Input: Consider Input: I'm sorry. I didn't find any matching events on your calendar.


Output: agent