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: Yeah is it
Example Output: user

Example Input: Sounds like the 2nd one is best
Example Output: user

Example Input: Hi I need help planning my schedule
Example Output:
user