This is a very unfortunate situation indeed. If you have not noted the other passenger details and if AF is not responding, I don't see what you can do. What's really strange is that the other pax has not contacted you.
Originally Posted by
knj70
From the airline, can I get any reimbursement for the lost items?
No.The airline has no responsibility on this. Your travel insurance may help.
Let us know if you have further information and hoping that you will retrieve your bag soon.