Example code for when two or more tickets being bought have a note that says, “Please ensure the correct information is entered for each participant”

my_add_inline_script_ts_multiple_ticket_select.php

<?php
//* Please do NOT include the opening php tag, except of course if you're starting with a blank file

add_action('wp_enqueue_scripts', 'my_add_inline_script_ts_multiple_ticket_select', 20);
function my_add_inline_script_ts_multiple_ticket_select() {
    $custom_js = 'jQuery(document).ready(function($){
        $(".ticket-selector-tbl-qty-slct").change(function(){
         if($(this).val() >= 2)
            alert("Please ensure the correct information is entered for each participant");
        });});';
    wp_add_inline_script('ticket_selector', $custom_js);
}