Hello there,
Editing bookings feature is available in the Hotel Booking plugin starting form v. 3.8.0, you should make sure your plugin version is 3.8.0+
Once the booking is question is opened, you may use either “Edit Dates” or “Edit Accommodations” button to edit existing booking information.
If the issue persists, provide temporary access to your WordPress dashboard in a private reply, so I take a closer look at it.
Regards,
Andre