Mathilda: Do you "clean" anyone?
Léon: No women, no kids, that's the rules.
Mathilda: How much would it cost to hire someone to get those dirtbags who killed my brother?
Léon: Five grand a head.
Mathilda: Wow. How about this: I work for you; in exchange, you teach me how to clean. Hmmm? What do you think? I'll clean your place, I'll do the shopping, I'll even wash your clothes. Is it a deal?