French phrase
Vous vous êtes trompé de ~.
Meaning
You've got the wrong ___.
When to use it
Shows that the wrong object, vehicle, or route was chosen. It is a gentle, polite correction used face to face.
Example dialogue
Excusez-moi, c'est le train pour Lyon ?
Excuse me, is this the train to Lyon?
Vous vous êtes trompé de train.
You've got the wrong train.