How to say good morning to a lady in French?

Answer 1

Bonjour Madame if she's married, or has been married.

The French language has always kept the word Mademoiselle for unmarried women. However, the Academie Francaise, in their Immortal wisdom, has decreed that single women over 21 have the right to be called Madame if they wish it. It's generally more appropriate to use Madame than Mademoiselle.

If you want to chance it, it's bonjour Mademoiselle.