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".

Create a meeting in the afternoon on Monday
user

Can you change it to 11 please?
user

I need to go get an oil change on Tuesday of next week at 11 am for 45 minutes

user