[It's Sif? Oh, Steve's heard a fair amount about her from Thor, and also caught wind of the reports about her brief arrival on Earth, though he hadn't been directly involved in that operation so it had been nothing but a few scant details.

Still, she's a trusted friend of Thor's, so while she may not be someone Steve knows personally, there's no reason that can't change now. He's relieved when her face appears on the screen, if only because it's more personal than texting. Texts may be more convenient, but it doesn't beat seeing someone's face and hearing their voice.]

He speaks highly of you too, Lady Sif. It's nice to finally meet you.

[Though her presence here makes him wonder.] If both you and I are here, I wonder if it won't be too long before Thor shows up too.