FlyerTalk Evangelist and Ambassador: The British Airways Club
Join Date: Jun 2008
Location: Somewhere between 0 and 13,000 metres high
Programs: AF/KL Life Plat, BA GGL+GfL, ALL Diam, Hilton Diam, Marriott Gold, blablablah, etc
Posts: 33,119
I don't believe that lounges have direct numbers so indeed, your best shot is to contact AF and ask if the message could be passed on. That is about as much as you'll manage unless of course you can contact the passenger directly (no phone, email, etc?)