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]: Can you schedule me a meeting with Fiona Mason and Karl Boon tomorrow from 2 pm - 4 pm?
[A]: user


[Q]: Sorry, neither of the options I suggested is .
[A]: agent


[Q]: I've put that on your calendar. No, I didn't find any events on Friday the 17th at 12:00.
[A]:
agent