[He licks his lips as it's pointed out, before looking down slightly.]

Technically it's thinking out loud, JARVIS used to always be there to reply.

[He leans back and regards the drawing, then nods at it before slipping it to the bottom of his paper pile and starting some vague Iron Man schematics.]

But now, he's not here to talk down to me so I've been trying to. Not... Do it.

[For a moment he looks incredibly lonely, but it disappears as face as it appears as he starts drawing his helmet.]