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".
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Question: Do I have a dentist appointment for next Tuesday already on the calendar?

Answer: user


Question: when is the online shopping

Answer: user


Question: hmm

Answer:
user