Most reading the France section know about the train strike and if you are going to France soon you are certainly concerned. But Take Heart!
Here is what happened to me:
I had booked and paid for tickets on the TGV from Paris to Torino more than a month before my trip. Then found out later my train was on an announced strike day. Deciding there was nothing to do about it, and locked in to my stay in Florence in an AirBnb I decided to wait to see what happened.
I got an email two days before my train from SNCF telling me my train was cancelled and I could rebook or refund my ticket and to call a given number. I decided to wait until I was back in Paris.
When I got to Paris I went to the ticket office at Gare D’ Lyon and talked to a customer service person who told me to just show up the next day and talk to the manager at the gate. Not trusting this advice I went back two hours later got back in line and started over. I was told again that my train had been cancelled and that the only train going to Torino was in the afternoon at 14:41, and that there was probably no space on that train, that ai should just rebook another day.
Instead I asked to take a number and sat down to wait. In only about 15 minutes...there were 17 people ahead of me when I sat down... my number was called. As it turned out I got two 2nd class tickets and one for Jake my pooch for the afternoon train I was repeatedly told was impossible. Now my original tickets had been First Class. But I was happy to get on.
At the platform I approached the SNCF man at the gate and asked if there might be room in First Class after all...more room for the dog... Well everyone was very helpful and quite nice and i did get two seats together in First Class.
The moral of this story...long as it is...is to IGNORE what you are being told and go directly to the Ticket office. Politely but firmly insist on getting a number and go through the process. There will be SNCF people at the door to the ticket office to answer questions and turn a lot of people away but if you persevere I think you stand a good chance of getting your ticket and getting on a train.
Now I understand that the situation may be different for internal France trains but I think the same strategy may pay off.
Good Luck!