There are so many things to know when it comes to communicating with folks in Paris but one of the most important aspect is that they like to cancel on you the last minute. The funny (or more super annoying) thing is even though that person know that he/she can’t see you as planned, it’s up to you to find out.
What you must learn is (if you ever have the patience to get a French friend) to ask that person the same day you are supposed to meet if you guys are still seeing each other. If not, you can’t really expect that person to show up. In my world this is crazy as hell because 1) If I can’t make it I would let you know in time and 2) how can you think that your time is more important than mine?