"Hello everyone, I'd like to introduce Elizabeth who is working in accounts",
"Hello, Lizzie! welcome to the company"
"Thanks a lot, it seems to have a great atmosphere, by the way everybody calls me Elizabeth - I'll think you are talking to my cousin if you call me Lizzie".
Right response: "I'll remember that, do you want a tea or coffee Elizabeth?"
Wrong response: "Oh, I can't be doing with 'Elizabeth', I'm sure that won't be a problem for you Lizzie, right Lizzie, tea or coffee?".
We are adapting to different people all day long. Sometimes there are awkward moments, and it is true that elderly people often find change difficult, particularly change relating to language. However, the idea that if it weren't for political correctness language would stay the same and everybody could be treated identically without risk of offence is just wrong.