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]: After lunch I have a meeting with Bob.
[EX A]: user

[EX Q]: The "doctor app" is on November 22nd from 11:00 to 11:30 AM.
[EX A]: agent

[EX Q]: I found one other event next month. It's "doctors appointment" on October 12th from 12:00 to 12:30 PM.
[EX A]:
agent