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: What about Matt's manager?

A: user
****
Q: No. I didn't find any events on your calendar.

A: agent
****
Q: I will be leaving on a desert trip that will go from the 3rd until the 8th.

A:
user
****