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: second one looks fine, call martha

Output: user


Input: Consider Input: Yes, that's good! Decline my invitation to go on a Brewery Tour with Thomas and tell him that I'm going to the Water Park that day.

Output: user


Input: Consider Input: Yes. Also change the ending time for the event to 2 PM


Output: user