I saw a similar feature at least ten years ago elsewhere. I'm not sure of the airline but it might have been Air France. It was more basic - think SMS - and you

I saw a similar feature at least ten years ago elsewhere. I'm not sure of the airline but it might have been Air France. It was more basic - think SMS - and you could do voice calls as well. I figured it was meant for people who were traveling together but who were not sitting together.