Test Task - Python Programmer - Event Registration

This task is to be done in Python 3. You are free to do the task at your earliest convenience. You are not limited by time and we are not measuring it. Also feel free to use Google or any other source. But you should do the task all by yourself, without any external help.  

There's no need to enhance the task in any way, try to do your best to achieve the result as per the instructions provided.