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: thanks and make a meeting with dan schoffel tomorrow
Example Output: user

Example Input: Update convention to make it 4 hours long.
Example Output: user

Example Input: Yes. It will be clear with a temperature of about 0.00 °F for "team meeting" on May 7th from 3:00 to 3:30.
Example Output:
agent