I'm sorry I can't help you with registration information, but my Greek friend at school who flies domestically in Greece every summer told me that the Greeks have a saying that translates, in essence, as "Greeks don't let other Greeks fly Olympic".
She flies Aegean and has always been impressed with the service. I hope your flight(s) was/were the same!!
Pan Am:The World's Most Experienced Airline - P(oor) S(ailor's) A(irline): San Diego's Hometown Airline-Catch Our Smile!