Narrative:

Prior to pushback; after 'all passengers boarded' PA had been done; I did my briefing to the passengers who had been seated there. At this time seat XX2 had still been unoccupied. On my way forward; I secured the forward portion of the aircraft; where I had 2 passengers in seats Y1 and Y3 with all 3 tray tables down and all their carry-on items in the middle seat. I asked them to stow their items and continued forward. In the time that I made it forward; 3 more passengers boarded. First a gentleman; then 2 others that were traveling together. Without stepping in front of the first gentleman I acknowledged to him that there were still empty rows left in the back of the aircraft. I said the same thing to the two guys (traveling together). I saw the 2 guys make it to the back; but did notice the first gentleman sit down. During the demo; on my first walk-through; I had to stop at row X for the second time to address the carry-on and tray tables; although I would have most likely noticed the gentleman at this time; I did not. I knew we had been told we were on a 'short taxi' so there was a time constraint already. During my oxygen demo; I once again had to address row X; as they still had not moved their carry-on and now were not wearing their facial coverings. Again; I did not notice the gentleman.we quickly got up after 10;000 feet; I went to the back to get the snacks and this is when I realized he had not been sitting there when I briefed initially. I distributed snacks and then went to the gentleman who was sitting in seat XX3 and his wife who had moved to YY2 after he boarded. I gave him a briefing at that time.

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Original NASA ASRS Text

Title: Flight Attendant reported not briefing an exit row passenger due to the late arrival of the passenger.

Narrative: Prior to pushback; after 'all passengers boarded' PA had been done; I did my briefing to the passengers who had been seated there. At this time seat XX2 had still been unoccupied. On my way forward; I secured the forward portion of the aircraft; where I had 2 passengers in seats Y1 and Y3 with all 3 tray tables down and all their carry-on items in the middle seat. I asked them to stow their items and continued forward. In the time that I made it forward; 3 more passengers boarded. First a gentleman; then 2 others that were traveling together. Without stepping in front of the first gentleman I acknowledged to him that there were still empty rows left in the back of the aircraft. I said the same thing to the two guys (traveling together). I saw the 2 guys make it to the back; but did notice the first gentleman sit down. During the demo; on my first walk-through; I had to stop at row X for the second time to address the carry-on and tray tables; although I would have most likely noticed the gentleman at this time; I did not. I knew we had been told we were on a 'short taxi' so there was a time constraint already. During my oxygen demo; I once again had to address row X; as they still had not moved their carry-on and now were not wearing their facial coverings. Again; I did not notice the gentleman.We quickly got up after 10;000 feet; I went to the back to get the snacks and this is when I realized he had not been sitting there when I briefed initially. I distributed snacks and then went to the gentleman who was sitting in seat XX3 and his wife who had moved to YY2 after he boarded. I gave him a briefing at that time.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.