I had a flight on Christmas Eve in 2001. We were flying non stop from Los Angeles to Dulles in Washington, D.C. Sitting in first class was Debbie Reynolds. We had a good flight and things were calm and quiet in the cockpit, so I thought maybe I could go back and chat a few moments with Miss Reynolds, if I could see that she wasn't trying to relax. She was traveling with a younger lady whom I did not recognize. May have been her secretary. I saw that they were just talking to one another, so I politely interrupted and welcomed her aboard. She thanked me and asked if I wasn't needed in the cockpit. I told her no, everything was fine and we have had or reports of turbulence until we get past Kansas City. The other lady at that moment offered me her seat, but I declined. I just wished her a happy holiday and was going to move on, when she said, "Excuse me, Captain. You are the Captain, right?" I told her that I was and then she said, "Well you meant to say, Merry Christmas, didn't you?" I told her yes, she was right, but I have to be careful not to offend anyone. She said she doesn't worry about such stuff anymore. I smiled and moved on.