So a little commentary here before today's prompt. I really like immortal stories. They fascinate me, obviously there is a lot to think about, about living forever. The best immortal stories, in my mind, are the ones where they are not really immortals but where the "people" are just incredibly long lived. With all that in mind, instead of a snippet of dialogue today I give you an idea, a story setup.
Imagine a species of human-like creatures that lives until they reproduce a same sex child. So if a pairing occurs and there is a male child, the male of the couple passes their "Immortality" to the child and will die within the next 30-40 years, like a normal human. They can mate with humans, but if the immortal has a same sex offspring, then the child would still be "immortal." Needless to say they don't reproduce often. I am thinking something along the lines of a mother who saw the pyramids being built, a daughter who was a witness to Christ's birth and granddaughter who watched Aldrin and Armstrong walk on the moon.
So that is your setup. Have fun with it.