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".

[EX Q]: The humidity will be 0.00% tomorrow.
[EX A]: agent

[EX Q]: Are there any meetings in the next couple of days?
[EX A]: user

[EX Q]: You have 2 events on your calendar. Your "appointment" is tomorrow from 8:00 AM to 5:00 PM.
[EX A]:
agent