Hey, as long as it isn't one of those obnoxious kids from the magic school, he's okay with whoever's on the other end of the... magical talky monsters. He'll send back a message of his own soon enough, and he looks happy enough, though not nearly so derpy.
"Hey, Kyouraku-san. That's a really kind offer of you to make, and I think I may take you up on that. Having a room to myself would be fantastic."
See, he knew Kyouraku was a good guy, what with the whole offering him a place with some privacy and helping save Rukia before that and everything. A very strange man, but trustworthy.
"I'll get back to you soon with a definite answer as soon as I clear everything up around here." Oh, but- "Have you talked with Inoue or Keigo about this? Keigo's... he'll come around, with regards to you, I'm sure."