I had been helping him interloan books written in French, a rather complicated process involving lots of typing and head-scratching, since the interloan catalog stubbornly refuses to understand French.
Mr. E.F.: merci beaucoup!
me: (trying to be impressive but drawing giant blank)… OUI!
Mr. E.F.: (chuckles and walks away)
me: wait…au revoir!!
Mr. E.F.: Au revoir!
I wish I knew how to say ‘you’re welcome’ in French.