If you wish to ask for a refund for your tickets, please follow the following steps.  
 

If you bought your ticket online at airfrance.be
Call Air France on 070 / 22 24 66
Our operators will guide you through the steps to follow.  
 
If you bought your tickets by phone on 070 / 22 24 66
Call Air France on 070 / 22 24 66
Our operators will guide you through the steps to follow.

Tickets purchased from an Air France agency or a travel agency
Please go to the branch in question. It will process your request. 
 
If you bought your tickets in an agency
Request a refund from this agency (Air France agency or travel agency), and take your original ticket(s) with you.  
 
In all cases
Remember to attach your original issued ticket to your request (unless it is an electronic ticket) along with any supporting documents needed (medical certificate, description of extenuating circumstances meaning you were obliged to cancel, etc.).