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:
What days are marked as out of office for April?

Ex Output:
user


Ex Input:
Make an event with the subject being "Calypso Learn Linguistics"

Ex Output:
user


Ex Input:
Change the time to 8pm

Ex Output:

user