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".

Input: Consider Input: Update convention to make it 4 hours long.

Output: user


Input: Consider Input: Do I have anything going on on Sunday?

Output: user


Input: Consider Input: Actually make it later in the day


Output: user