Skyfire was trying to be respectful so he did his best to make sure that he didn't tower over her, laying his head on his paws to bring his head down to her level.

"There might have been, since I wouldn't have the shape otherwise, however they likely haven't been around in a very long time..." He pauses and considers things a moment. "How do you measure time where you're from?" He's not going to assume that everyone uses the same measures as the humans were starting to use from his home dimension after all.