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".

Input: Consider Input: can you adjust that so the lunch with Alex ends at 12:00 PM instead?

Output: user


Input: Consider Input: I didn't understand that. Could you say it in a different way?

Output: agent


Input: Consider Input: I didn't find any events on Thursday.


Output: agent