Conversation after you accept Return to Dust quest.
Clayton Backston: Boss, how did you survive? I saw you get cut in half.
Anna Bizrim: Ugh, Clayton, we're undead, of course we can survive getting cut in half.
Timothy Zarltin: Sometimes.
Chadwick Paxton: It's not the first time I've been cut in half. Hopefully, it'll be the last.
Anna Bizrim: When WAS the first you were cut in half?
Clayton Backston: ...That information is classified.
After you complete Return to Dust quest this conversation starts when you approach the group of undead.
Ingrid Bellix: Ahaha, that was amazing! And you're still alive!
Chadwick Paxton: That's a relief, but I believe it was tad over the top for my tastes.
Clayton Backston: Does it seem like overkill to anyone else that we annihilated several scores of sethrak over killing a few of us?
Anna Bizrim: No.
Timothy Zarltin: Nope.
Ingrid Bellix: Not in the slightest.
Clayton Backston: ...Right. Just me, then.
After turning it in they start to walk away
Chadwick Paxton: All right, move out! We have more o this place to scout, and we can't get ourselves ambushed again.
Anna Bizrim: I don't think that's our fault, boss, given that we were attacked by a group that wasn't supposed to be here
Clayton Backston: We should've seen the attack coming. Who was supposed to be the lookout?
Timothy Zarltin: It was Tucker. The sethrak killed him first.
Clayton Backston: Tucker! Should have known. At least he paid the price for his incompetence.
Chadwick Paxton: Keep it down! Lady Sylvanas won't be happy if we fail our mission.
Ingrid Bellix: Is she ever happy, boss?
Chadwick Paxton: She will be if we do our jobs properly, Ingrid.
Undead sure are interesting bunch :)