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: I'll take the second one with tess.
Example Output: user

Example Input: And who has not declined bbq party?
Example Output: user

Example Input: Put a tee time of 10 AM at Bluesperry with Paul, Don and Matt for next Saturday.
Example Output:
user