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: what will the weather be like in colorado next week?
Example Output: user

Example Input: Can you create a new appointment for monday morning?
Example Output: user

Example Input: Yes I'll need to create an event for New Years day
Example Output:
user