When you click on "Link existing booking", you are redirected to the bookings page:

There are two things we could improve here:

• Currently, the bookings page uses the current date. It'd be better if it used the date of the event (or the first day in case of multi-day events)
• The bookings page currently shows all bookings which makes it hard to find a booking which can be linked. We should filter the bookings using the linked event to only show relevant bookings.

cc @moliholy @OmeGak