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".

Q: The event "returning flight" is on Tuesday the 17th at 12:00 PM.

A: agent
****
Q: I didn't find any events on Tuesday the 12th.

A: agent
****
Q: Do I have anything on my calendar on Monday of next week

A:
user
****