instruction:
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".
question:
make a appointment tomorrow
answer:
user


question:
second one looks fine, call martha
answer:
user


question:
I just need to know why all my appointments are gone.
answer:

user