French phrase
En fait, je préfère que l'on m'appelle ~.
Meaning
Actually, I'd prefer to be called ___.
When to use it
A polite request for a preferred form of address. It works well when requesting a title or surname in the workplace.
Example dialogue
En fait, je préfère que l'on m'appelle Monsieur Dupont.
Actually, I'd prefer to be called Mr. Dupont.
Très bien, je vous appellerai Monsieur Dupont.
Very well, I'll call you Mr. Dupont.