Given the task definition, example input & output, solve the new input case.
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: Let me know if there's anything else I can help you with.
Output: Agent
In this example, the speaker wants to help, and it's part of the agent's job. So, the output should be "Agent".

New input case for you: Rename it to Dental Appt.
Output:
user