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 Input:
I've changed "Confession to my Priest" to be at 8:00.

Ex Output:
agent


Ex Input:
Are there any meetings in the next couple of days?

Ex Output:
user


Ex Input:
Book the meeting for 2pm.

Ex Output:

user