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".

add dinner with Barack Obama for wednesday at 8pm
user

Yes, I found one event on Monday the 22nd. It's "Appointment" from 11:59 to 12:01 AM.
agent

when is the online shopping

user