The list of 'stand bys' was handed to me when I worked at the airport. Time came for the flight to board and great, there were a few seats not claimed, so I began calling out the names on the 'stand by' list.
Unfortunately, the first two names Mr & Mrs..... didn't show themselves so they missed out. Just as the doors were closing, I received a call from the person who handed me the list, saying, "Oh! I forgot to make a note at the side of Mr & Mrs...... They are both deaf!!" I never did tell them there were seats available.
No wonder they never heard me call!