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".

Ex Input:
Thanks, add a one hour lunch with Emily at noon tomorrow.

Ex Output:
user


Ex Input:
Yes, but add my doctor to it

Ex Output:
user


Ex Input:
Do I have anything on that day that shows as busy

Ex Output:

user