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:
Get a room in city center at 3 tomorrow

Ex Output:
user


Ex Input:
How long is the dinner tonight?

Ex Output:
user


Ex Input:
The event with gavin this week is located at toilet.

Ex Output:

agent