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:
Yes, but add my doctor to it

Ex Output:
user


Ex Input:
Yes, that looks right! Thank you.

Ex Output:
user


Ex Input:
Can set meeting with john on Monday

Ex Output:

user