It takes him a bit to understand, he's sluggish in just about everything and it's only been a couple months (has it really?), he's not fluent, but eventually he translates that in his head and —

While his instinct is to be all oh no I'm fine thank you because he never wants to bother anyone ever about anything, it's an instinct he has honestly been trying to learn to repress. So he nods instead, consciously, and struggles to sit up a little so he doesn't have to be gazing up at her awkwardly. He's rather pleased with himself for managing even that little bit of movement. Basically he's like Robocop or something.

"Hi," he manages after a bit.