You said it was just a young lady. Is she a good friend, relative, or just someone who approached you cause they heard you make quilts?
I don't advertise, or sellll my quilts, I just like keeping busy. A couple of friends have approached me in making memory things, some of them difficult some not so much. I don't really charge, but if they ask, then I tell them I like a specific beer. One even brought me some boiled crabs with beer. Since you didn't discuss $$ it seems, I would tell her whatever she feels or a gift card. I know many will not agree, but doing things with our talent for someone every once in awhile is worth more than money. Though that's just me.