A dark pattern implies something that is intentionally misleading. This is just lying. This is not a dark pattern because it’s Worse.
I mean, you can't be sure they're lying. Odds are nonzero that 38 ppl were looking at that flight
I suggest you click on the link, they absolutely are lying. They're using JS to generate a random number between 28 and 45. If there happens to be 38 people looking at that flight it's entirely coincidental.