"Kiss me, you fool!" << romantic plot that might keep the astronaut from going into space? Sounds like a story to me.
"Alex, why did we go to 'collage' instead of college?" << Maybe her misspelling reveals that "Alex" is a spy from another countries space program, lot's of story there!
"I'm an astronaut, who's the 'retard that doesn't study enough' now?" << A past rivalry? Maybe Alex is the Gary MF Oak of the main character's life and he has just been assigned to join the astronaut into space! DRAMA!
"The direction away from the center of gravity of a planetary object. Did you skip that day in astronaut school?" Low budget educational straight-to-VHS movie about gravity and stuff?
"What isn't up, Andy? In this upside down world we live in are we really the capable of making judgments on matters we cannot fully understand? I thought you, my former roommate Arthur, of all people would understand that. How far we've fallen, Albert. How far we've fallen." << Clearly there's enough potential depth here to get a novel in the works. Does the astronaut have Alzheimer's? Does Alex have a plethora of alias? Commentary on the current state of humanity within the realm of the science fiction universe being presented where astronauts drive from their houses to launch sites on the day of takeoff? I could go on forever with potential plot direction on this one!
"I'm an astronaut and I'm going to space." << Yeah this one doesn't really make the story go anywhere.
"K-Far will not pick this response, knowing that he must pick something unexpected to beat people's opinion that he only picks boring responses." << Breaking the forth wall, EDGY.
Don't blame us for you lack of imagination and/or fear to take the story anywhere remotely interesting or fun.