je vous en prie

Etymology
lit. 'I pray you (to do so)'.

Phrase

 * 1) I beg you, I entreat you
 * 2) please do, go ahead, be my guest
 * 3) you're welcome after being thanked
 * 1) you're welcome after being thanked

Usage notes

 * This phrase is more formal than de rien.

Synonyms

 * (to a person addressed with )
 * (to a person addressed with )