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".

Example Input: Cancel my doctor's appointment tomorrow.
Example Output: user

Example Input: has anyone not declined their invite for the dog divorce?
Example Output: user

Example Input: Can you also schedule Jane's Dance Recital next Tuesday from 5:30 pm to 6:30 pm?
Example Output:
user