What does the woman help the man do?

W Okay, I just need a little more information from you and we’ll be able to process your application. First, could you spell your first name for me, please?
M Sure, it’s Yu-Chang. That’s Y-U-hyphen-C-H-A-N-G. The hyphen is part of the name.
W Okay, I think the form has space for a hyphen. That’s interesting—do you mind if I ask you where you’re from?
M I’m from Boston. We always include the hyphen when we spell our names in English. I have no idea how the practice started.