"Genie, I've been accidently locked in here overnight. I wish for you to transport me out."
"Sorry master," replies the genie-tiger "but I deal with transformations. I don't do transportation spells. I could give you wings and you could fly out."
"Why can't you give yourself wings?" you ask.
"My form must always be a tiger."
"Not even a winged tiger?"
"Sorry Master."
"And you don't have a magic carpet or anything?"
The genie goes through his pockets. "No carpet."
Terrific. So much for wishing your way out.