Aww, this was sweet and sad all at the same time, with a sort of wistfulness to it that really makes it linger in my mind.
I love the banter between Clark and Austin; it sounded so natural and organic -- which is especially noteworthy, because I think casual conversations are some of the hardest to write well!
And Lois even showed up! I was hoping she would, and then I was pleasantly surprised again when Dr. Klein was there, too, but it was tempered by poor Clark's sadness at that missing dot and his belief that he'd never see Lois again. I really liked how cautious he was about not giving out his contact information and all the things he has to think of at something so simple and everyday.
Really sad, but very good! Maybe one day he and Lois will be talking and suddenly remember this past run-in!