<human>: Okay so this FU happened 4 months ago(sorry)

So we were returning from a vacation to the U.S. and we had a connecting flight because my mum, my brother and I wanted to go to India for a bit, while my dad got off in Abu Dhabi. So the flights were booked like this : SF - Abu Dhabi - Bombay.
Here's where the FU takes place. 
At some point while we were in the US, I accidentally switched my passport with my dads. We get on the flight, and reach Abu Dhabi. 
My dad then exited the airport with MY passport. How you ask? Well in Abu Dhabi, we don't need to show our passports at immigration because we have these machines call e-gate cards, where you can your card, and can your finger print and then leave. ALL WITHOUT SHOWING A PASSPORT. My dad then begins the journey back to Dubai(where we live) which is an hour and a half from Abu Dhabi.
So here we are, chilling in the lounge, when our flight is ready to board. We walk up to the gate, and the guy asks for our passports, no problem, I hand him the first passport, It's my dads.
20 minutes left to board, we call my dad up and ask him to turn around. Hes already in Dubai. 
So basically, my mother and brother leave me and go to India, and  I have to cancel the flight, pay a cancelation fee, and book myself on another airline for a later flight .

Can you condense the text into a few key points?
<bot>: Accidentally switched passports with my dad during a connecting flight. He got off while I commenced on to another flight, realized I didn't have my passport, got offloaded.