Read the following conversation and answer the question.

W: Waiter, can you come here for a second please?

M: What's the problem, ma'am?

W: This soup is cold.

M: I'm sorry. I'll bring you some hot soup.

Question: What's the relationship between the two speakers? 

- Sister-brother.

- Husband-wife.

- Customer-waiter.


Customer-waiter.