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 day of the week is tomorrow?

Ex Output:
user


Ex Input:
Can we change a date?

Ex Output:
user


Ex Input:
I need to schedule a meeting with both Lisa and Kim's manager for 9AM tomorrow.

Ex Output:

user