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: Yes schedule that
Example Output: user

Example Input: And on the 17th?
Example Output: user

Example Input: Make another calendar event for hanging out with friends on Friday between 7pm-10pm
Example Output:
user