Events Booking allow users who granted permission to be able manage registrants from frontend of your site, almost the in the same way with backend registrants management except they cannot import registrants from frontend. You will want to use this feauture:
Please follow the steps below to setup if you want to use this feature:
You first need to configure your site to allow users from the user groups you want to manage registrants from frontend of your site. Go to Events Booking -> Configuration (or any pages in Events Booking in administrator area), click on Options button in the toolbar, select the user group(s) you want to allow managing registrants (for example, Author group), set Front-end Registrants Management permission to Allowed. Please note that permission settings in Joomla are inherited, so when you enable this permission for a child group (Author in this example), all it's children groups (Editor, Publisher in this example) will have this permission allowed, too.
Next, you will need to create a menu item to link to Manage Registrants menu option of Events Booking. Users can access to that menu item to manage registrants.
In case you allow users on your site to submit events, you will only want to allow them to manage registrants of their own events only. Go to Events Booking -> Configuration, set Only show registrants of events owner config option to Yes. By doing that, users will only see registrants of their own events (events which they submitted). If you want users to manage registrants from all events in your system, set that config option to No.