[Mikleo's response isn't immediate, but it's within a day or so, at least. He'd honestly debated whether or not to use voice at all, but Belthazar sounds nervous enough already; his answer might come across as less sincere if he didn't respond in kind.

Thus, even though he still sounds tired and not yet at full strength:]

Thank you for the invitation. I appreciate you thinking of me, and even more so for helping Sorey. I know he really needed the support at the time, and I-

[You know what, nevermind that.]

...I can't give you a definitive answer yet, unfortunately. I'm still recovering, and eating has been- [impossible] ...difficult. If I can come whenever you decide to arrange it, though, I will.