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:
Ok who will be joining me for lunch?

Ex Output:
user


Ex Input:
The event matching "Amanda's birthday party" next week is on Tuesday the 8th at 11:00 AM.

Ex Output:
agent


Ex Input:
Add a meeting with Lori for tomorrow at 3 pm

Ex Output:

user