Question

I have applied an internship in a big 4 firm recently, but I don't know if I will be selected to the on campus interview until 3 days from now. But before that, I want to request a office location preference change. How can I do this in a appropriate way? If do this through email, what should I say?

And the most importantly, what will the recruiter think about my request? Will he/she reject me because of that?

I will be really appreciate if you can give me some advice.