This Dialog is after the Cinematic.
Calia: Ah, Jaina. What a relief to see you safe.
Jaina: Hello, Calia. Big Brother.
Derek: Word has spread of what happened at Orgrimmar. Is the war finally over?
Jaina: It will take time for all the pockets of fighting to be quelled but… yes, I believe so.
Calia: Azeroth has seen so many wars, so much strife. I pray we have earned a respite.
Jaina: As do I. Have you been able to find peace in your own heart, Derek?
Derek: I still have some rough seas to sail, but I’m much better now, thanks to Calia. Without her guidance, I would have been truly lost.
Calia: I’m so grateful you brought us together, Jaina. This time with Derek has helped me as much as it’s helped him.
Jaina: In this wake of this war, others will need to find their footing. Their future. Perhaps you could guide them, too.
Derek: Maybe they don’t need answers. Maybe they just need hope. Like I did.
Jaina: Well said, big brother. Come, let’s take a walk. I am so grateful to have you both back in my life
Source = https://www.wowhead.com/news=295287/war-campaign-epilogue-dialogue-calia-menethil-and-derek-proudmoore-spoilers
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