Teacher: In this task, you are given a dialogue from a conversation between an agent and a customer. Your task is to determine the speaker of the dialogue. Answer with "agent" or "customer".
Teacher: Now, understand the problem? If you are still confused, see the following example:
Hello. How may I aid you today?
Solution: agent
Reason: This is a pretty straightforward dialogue, and the speaker wants to help the other. So, the agent is the speaker.

Now, solve this instance: Which class do you prefer?
Student:
agent