This is how Starscream talks to Galvatron goes in Unfinished.
[We see Galvatron standing alone in space on an asteroid]
Galvatron: How could I have failed? After so many millennia of battles wage, everything lies in ruin.
Starscream: (voice) So, you're giving up. Heh, you're certainly no Unicron!
[Galvatron sees a dark shape approaching]
Galvatron: How can this be?
Starscream: You and Ryan defeated me and this is all you have to show for it? How dare you give up before the job is done!?
[Starscream, in spirit form, appears before him with Soundwave and Sideways by his sides]
Galvatron: You... Starscream!
Starscream: So you haven't forgotten me like you forgot your ambitions, or was it just too much for you?
Galvatron: You dare talk to me of ambition, you backstabbing fiend! If not for them, those accursed Autobots, I would have destroyed the universe!
Starscream: Hehehe... well, whatever you have to tell yourself.
[Starscream starts to dissolve]
Galvatron: Starscream! Come back here!
[But he's gone. Galvatron notices his crown on the ground and picks it up]
Galvatron: Hmmm, his crown... As pathetic as it sounds, he's right! [chucks Starscream's crown away] I am Galvatron.
[Thomas appears behind him]
Thomas: We know you are.
Thomas: But that doesn't mean you can't learn about friendship.
Galvatron: OpThomas Prime. You saw your friend help me?
Thomas: Yes. And he understands you and so do I. I can help you learn about friendship. [extends his hand to Galvatron] Take my hand, Galvatron. Let me show you that there is another way. Like Twilight once did for Sunset.
[Galvatron hesitates for a moment but then reaches out for Thomas' hand and takes it]
Galvatron: At least I would fight Optimus one last time.
[They turn and see the Equestria Girls]
Sir Daniel Fortesque (EG): You did well.