German phrase
Mit wem habe ich die Ehre?
Meaning
Who do I have the pleasure of speaking with?
When to use it
It politely asks who you are. It has a very formal and respectful tone.
Example dialogue
Mit wem habe ich die Ehre?
Who do I have the pleasure of speaking with?
Guten Tag, hier spricht Frau Müller von der Personalabteilung.
Good day, this is Ms. Müller from the Human Resources Department.