"I... um..."
You stammer a bit and then fall silent. There are so many thoughts that whirl through your head -- you could wish for wealth, you could wish for fame, you could wish for a girlfriend. Heck you could wish for a harem. Maybe you could even wish for...
Your heart beats faster and your stomach clenches. This is too good to be true. You can't really doubt that you're confronted by a bona fide magical genie, though you do surreptitiously pinch yourself. But can you trust her? You have other questions too.
"Just... just one wish?"
"Yes, master, that is the rule of my service," she answered, polite but bored.
"Better make it good," you accidentally mutter aloud. She raises an eyebrow but does not comment.
"So, um..."
You kind of want to ask about her, both because in the moment it feels weird to just make a demand of someone to do something for you; and because, again, you're not sure you can trust her to not screw up your wish.
But your thoughts have settled, and what you want is indisputable. It's actually very obvious to you, now that you're a touch calmer. And you don't see how she could mess it up; it's really quite a simple wish. That other complications might arise from this wish has not yet occurred to you.
"I wish..." You take a deep breath, nerving yourself to actually say the words. "I wish to be my fursona."
"Your... 'fursona?'" The genie blinks. You blush in embarrassment.
"Y-Yes?" You hadn't actually thought that this would be an issue. The genie frowns, and your skin prickles; but then her expression clears.
"Oh my." Then, to your relief, her lips quirk in a smile. "The world's changed a lot. I had to search your memory for a bit to see what you meant. Very well, master; I grant your wish."
She extends a hand towards you with a little flourish. You feel a zing of energy through you, making your heart flutter -- though that could just be the excitement.