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".

I am planning to visit Orlando to meet my friends, airport code is MCO.
customer

I need to change my reservation due to postpone of my exams to some other dates. Could you please change it for me?
customer

I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.
agent