Your own sister! That's so COOL! Igneel's my pops! Well not my real pops, but he was the closest I had!

[ Of course, the hope of finding him is dashed after the admittance. Natsu is able to keep himself from looking too depressed about it, though. ]

It was a long shot anyway, so don't worry about it. 'm just glad to hear that dragons are still thriving in your world. Ours disappeared seven years ago without a trace. Been lookin' for Igneel ever since.