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 Q]: I've put that on your calendar on March 4, 2030 from 10:00 to 10:30 AM. __BREAK Is this what you want me to cancel?
[EX A]: agent

[EX Q]: Put me down for coffee with the girls on Saturday morning.
[EX A]: user

[EX Q]: That event is correct.
[EX A]:
user