From the Making of Fire Emblem: 25 Years of Development Secrets book comes a script from the canceled Fire Emblem 64. It is the only dialogue example provided for the game. For some more trivia about this game, I made a post about some design documents from it here.
I translated it in full since it contains some interesting tidbits for FE fans, such as the names Eliwood and Ephraim just to name a few! Also, it reveals who the two characters in the only screenshot released for the game are.
You can find much more from this book on the compilation post here.