TIFU: So in honor of the norm of this sub this incident happened about a year ago.
I worked as a Travel Agent in rural Australia in a small office that was run by the largest Travel company in Aus.
I had a client come in one day one of my very first who wanted a basic travel package to Vanuatu,
sure no problems easy enough I work it up for them take their money and send them on their way until their tickets are ready (about 4 months after the payment).
Fast forward 6 months I get woken up at 3am from our customer relations team letting me know of my colossal fuck up.
We had a system that let us know of all flight developments for the tickets purchased by our clients cancellations, time changes etc.
Now I had next to no training on this system and thus very important message got overlooked by my rookie eyes.
It turns out Virgin Australia had cancelled all flights to Vanuatu due to runway conditions about a week after I booked these flights.
So my clients are at the airport at 3 in the morning being told that their flight DOES NOT EXIST.
Long story short we paid for 2 first class tickets, 2 weeks of 5 star resort accommodation as well as food and drink expenses. Totalling $15,673AUD. And was promptly "let go".
TLDR didnt know what I was doing customers tried to board a nonexistant flight and I cost the business 15K and lost my dream job