iPhone 5 sleep/wakes button doesnt work, can I replace it?

Hi everyone.

I have an iPhone 5 16gb purchased in US in March 2013, now I see that sleep/wake button doesnt work. Searched on web and found out that is an hardware issue, and booked a meeting to Apple store. I think they will replace it, but the problem which may me doubt is that the iphone is bought in US from my friend, and now I live in Netherlands.

On Monday i will go in Apple store but not sure what will happen, ideas?