Francky... i know this! It's correct "Obrigada" when a girl speak and "Obrigado" when is a boy, but, speaking daily, currently we use more only "Obrigado" or abreviation (slang) "Brigadu".
I was saying that for kafetzou, who asked for knowing if this translation was good or not, and as I see you're Brasilian, kapota, I guess you may know how to say "thank you" in your mother- tongue!