Call her 'Madame', or 'Mademoiselle' if she looks young and unmarried.
"madame"
Madame.
Traditionally, in French a young or unmarried lady is referred to as "mademoiselle". A woman or married lady is referred to as "Madame".
When you don't know about the marital status of a French woman, you can write to her "madame". She won't be offended. Anyway there is no real equivalent to 'Ms' in French.
a young lady is called 'une demoiselle' in French. You address this unmarried woman as 'mademoiselle'
Mademoiselle is French for "miss", the formal address for an unmarried young woman.
Mrs. Black in French is Madame Black, abbreviated Mme. Black. Note that one does not translate the surname, Black. The common noun black is "noir" in French, but one would never address this woman as Madame Noir.
In French you would say 'the woman you dream of' la femme dont vous revez.
There is a great deal of confusion as to how to address a letter to an assembly woman in office. The proper salutation would be Dear Honorable and then their name.
In French, "Mrs. Jones" is translated as "Madame Jones." The term "Madame" is used to address a married or older woman, similar to "Mrs." in English.
In French, you would say "Au revoir, belle femme." This phrase conveys a polite farewell while complimenting the woman's beauty.
A French holy woman is 'une sainte' in French.