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:
I've changed "check out the new Ramen spot" to be for an hour at Kizuki.

Ex Output:
agent


Ex Input:
Can you put "Monthly Meeting" to the 2nd of November at 9 am please?

Ex Output:
user


Ex Input:
Can you tell me when Killswitch engage is coming to California?

Ex Output:

user