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: Your ticket is reserved in flight 1000.

SOLUTION: agent

PROBLEM: I have planned to book a plane ticket from PHX to OAK, can you assist me?

SOLUTION: customer

PROBLEM: Myself Cynthia Miller. I planning to visit San Francisco cities, can you help me in booking the flight ticket from SFO to HOU?

SOLUTION:
customer