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".
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Question: My travelling dates are 07/27 and 07/29.

Answer: customer

Question: I am looking for a flight form IAD to HOU. Will you help me in booking a flight ticket?

Answer: customer

Question: Thank you for your kind valuable service.

Answer:
customer