Mm, he's been working hard, so he probably deserves a time to relax as well! [Kinder to Yamato than he is to himself, tbh. As for that favour:]

If we had the pattern to make a furisode, I was wondering if you could help me to make one for him. That way he could have something special to wear as well! It seems to be that kind of event, after all. Though, I don't want to trouble you if you're busy since it's coming up so soon ー I'm sure others must be thinking along similar lines.