You would use vous, since M. Bernard means Mr. Bernard, and is formal. Generally if you're addressing someone as "Mme." "M." or "Mlle.", it's formal.
Bonjour, madame. Comment allez-vous ?
Bonjour, monsieur. Très bien, merci. Et vous ?
Comment vous appelez-vous ?
Je m’appelle Marie et vous ?
Adam Mon nom est Rousseau.
Où habitez-vous ?
J’habite à Paris.
Have a good day !!
1. Replace the name with a pronoun
I do not like to eat a salad at night.
2. Replaces nouns with pronouns.
These immigrants come from Algeria.
3. Replaces with a pronoun
Will they take a lot of time?
4. Replaces with a pronoun:
It was necessary to read five books for the class.
5. Put the sentence to the negative:
Students will have homework for tomorrow.
6. Put the sentence to the negative:
Parents have patience.
Blazer : veste (en français)