TASK DEFINITION: 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".
PROBLEM: Ok, please wait till I check with your existing reservation.

SOLUTION: agent

PROBLEM: My name is Melissa Williams.

SOLUTION: customer

PROBLEM: Flight-1011 is available with American airlines having single connection and the ticket costs you 200 only in economy class. Are you comfortable with this flight?

SOLUTION:
agent