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".

Example Input: Wilson, I did not find any reservation by your name in our database.
Example Output: agent

Example Input: Yes, I am ok with this flight. Please reserve a flight ticket with the name Helen Hernandez.
Example Output: customer

Example Input: I am Gregory Lee. I am planning to visit DFW to meet my friend, can you please find a flight from IAD?
Example Output:
customer