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".

what is tomorrow's schedule like?
user

Yeah, looks good thank you.
user

What is the subject of the event happening on Floor 37 right now?

user