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: I didn't find any events on Tuesday the 12th.

Output: agent


Input: Consider Input: I've changed "Staff Meeting" to be Mark.

Output: agent


Input: Consider Input: Yes. The chance of snow is 0.00% for "Hike" on Monday the 30th from 1:00 to 1:30 PM.


Output: agent