I saw an ad in the national press, once, placed by Patrick Moore
It seems a young chap (and his parents) had contacted Patrick, and asked if they could come and meet the great man, and look at his telescopes etc. He said "yes", and a date and time were agreed.
However, due to an oversight, Patrick was away on the day, and the lad missed his opportunity. Patrick, when he discovered his mistake, (and not having contact details for the boy) put ads in the national press asking for the boy's parents to get in touch with him, to re-arrange the visit.
A gentleman of the old school.