[She seems satisfied; that's approximately an equal exchange of information, content-wise.]
I was a civilian consultant for the United Nations Space Command for many years, their chief scientist. [Thoughtfully:] You want me to tell you practically everything I know, don't you? Very well. At some time in your far-flung and distant future, the balance of the galaxy tips. Aliens, a group called the Covenant, attack humanity's strongholds, destroying planets, killing millions upon millions. We also learn of a great race called the Forerunners, our predecessors, so to speak.