Cancel booking

1: Setup Cancel Booking

Allow the customer can cancel booking before x days

2: Customize field for this tab

2.1: Customize in template

Copy file 
wp-content/plugins/eventlist/templates/vendor/__edit-event-cancel-booking.php 
to
wp-content/themes/meup-child/eventlist/vendor/__edit-event-cancel-booking.php
and edit code in that file

2.2: Customize by Hooks

Setup "Allow Cancel Booking" option Default is No:

Add bellow code to functions.php file in child theme

add_filter( 'el_allow_cancel_booking_default', function(){ return 'no'; } );