Create whatsapp-chat out of text

Hey fellow adobe users,

a couple of months ago, my girlfriends phone broke and so did mine, so all of our chats were lost. A little later, I got them recovered. Now I want to make a book out of them (standard size paper with little features like time and service, other than that normal chat layout).

The big problem: There are a shitton of messages, about fifty-thousand. (So if I just spend one minute per message doing it by hand, I'd take about 850 hours of pure working time)

I would like to automate it, but I don't know if it's possible. The chats are in the following format: "DD.MM.JJ, hh:mm:ss: NAME: MESSAGE"
Does anyone have experience with that kind of stuff?

Thanks a lot in advance.

Leon