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: No, move to the 28th
Example Output: user

Example Input: Yes please that 1st one should be deleted.
Example Output: user

Example Input: The event matching "lottery winnings" on Monday the 28th is located at MetroGas.
Example Output:
agent