Private Message to Neville Longbottom

Neville,

Do you know yet what you're wearing to the ball? I don't!

Are our dress robes supposed to match or have complementary colours or something?

All of a sudden I'm horribly nervous about the whole thing and I don't even know why--I'm just glad I didn't get sent down for remedial etiquette, but there's always time for them to change their minds about that!