Found: Kids Fantasy Adventure Book

Fiction, Fantasy, Adventure, Grade School Book (might have been part of a series)
Main Character was a girl who knew a wizard character (and worked for him I think)
Dragons were in the story but I don’t think it was a main part of it (not sure if it’s in the title)
Cover was green with an orange car

Sorry this is so little to go off of. I read this book years ago and can barely remember anything about it, but I remember enjoying reading it so much as a kid, which is why I really want to find and read it again but I can’t remember it for the life of me.

Probably The Last Dragonslayer.

OMG yes! That’s it! Thank you so much!