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:
Can we change a date?

Ex Output:
user


Ex Input:
I'd like to create a new calendar event for work meeting at 10 am

Ex Output:
user


Ex Input:
Cancel my lunch appointment tomorrow so that I can go to the gym tomorrow afternoon at the same time as today?

Ex Output:

user