[Link smiles, admiring the kid's enthusiasm. He turns away from the other Link and whistles hard and loud for his enormous bird. When it lands in front of the two of them, Link carefully approaches her and offers her a gentle pat on her neck.

He motions for the smaller Link to join him beside the Loftwing, a warm smile remaining on his lips.]

It's polite to introduce yourself before riding someone's Loftwing.