Try adding a nopriv hook
add_action('wp_ajax_nopriv_csv_pull','list_reservation_to_csv');
This adds the option to run the function without being logged in as a registered user.
Try adding a nopriv hook
add_action('wp_ajax_nopriv_csv_pull','list_reservation_to_csv');
This adds the option to run the function without being logged in as a registered user.