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: No one is coming to the party - sad. Remove the entire event then.
Example Output: user

Example Input: Actually, I need it to be a little earlier
Example Output: user

Example Input: look good and pretty well thank you
Example Output:
user