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".

Example Input: You have 3 events on your calendar. Your "lunch with Alyce" is tomorrow from 12:00 to 1:30 PM.
Example Output: agent

Example Input: I'd like the website for Miller Union in Atlanta
Example Output: user

Example Input: John is no longer invited to my planning meeting.
Example Output:
user