Reuse old Rasa, domain.yml and training_data.json files for use in latest rasa version

I have generated my training data based on the previous version of Rasa. That was a manual process of creating the file, domain.yml file and training_data.json file/ file… Is there a way to automate this process or it has to be done manually only? Also, I find that there’s a change in the format for new rasa version. How can I use my old, training_data.json, domain.yml files for the new rasa version?