Green Shirt wrote:
IIRC it was Riker passing on the "mon ami" greeting to Picard from another ship's captain. Don't remember the ep, though.
We've both almost got it. Here is the exchange between Riker and Picard from Encounter at Farpoint
PICARD: Did you signal the Hood, Commander Riker?
RIKER: Your exact message. "Bon voyage, mon ami."
PICARD: What was my answer, computer?