Dear Harry, My apologies for not being there for your Quidditch match this week. I was scheduled to work at Flourish and Blotts, and they're already incredibly accommodating of my schedule so I try not to ask for extra flexibility. I'll try to be at your next one provided I'm well enough post-moon.
I don't know if Sirius told you, but I've lost a bet in a rather horrid game of poker, and I'll be moving to his flat this week. With him at Hogwarts a good deal of the year, it'll be good to have someone else there taking care of the place and maybe I'll manage to keep it clean for the half of each month he isn't living there. No promises though.
I had tea with your mum the other day. It was nice to see her but I'm missing your dad terribly. If you see him before me, get his arse in gear and send him my way for a visit, okay? Mum said you might have a bird you're dating now? I asked if your dad had clued you into the secret as to how to get past the trick staircase of the girl's dormitory. If he hasn't, let me know and I might be persuaded to give up the secret.
I hope you're doing well with your studies and I'll see you soon.