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".

Can you please help me with booking a flight ticket from LAX to IAD?
customer

I want to change my reservation due to postponed of my exam, so please help me.
customer

There is a flight available with price 100 and flight number is 1018, would you like to proceed with the booking?
agent