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: Can you extend this to 10am
Example Output: user

Example Input: Do I have any events between today's staff breakfast and the awards banquet?
Example Output: user

Example Input: Add lunch date with Bob for 2pm tomorrow.
Example Output:
user