Magento 2.2 – How to Submit URL in Popup Modal

I have created custom link using popup modal. I need to placed this link in My Account page->My Orders and next to Reorder link. Like below

While clicking cancel it shows an popup window which consist text area and submit button. While clicking submit,It should save in DB. I have written code, in my Controller file to save the message in DB, But I don't know where I need to give the submit url in below file. Please provide me a solution.

Thanks in advance

history.phtml

<div>
                                <a href="#" class="click-me">Cancel</a>
                            </div>

                            <div id="popup-modal" style="display:none;">
                                <textarea>
                                </textarea>
                            </div>
                            <script>
                                require(
                                        [
                                            'jquery',
                                            'Magento_Ui/js/modal/modal'
                                        ],
                                        function (
                                                $,
                                                modal
                                                ) {
                                            var options = {
                                                type: 'popup',
                                                responsive: true,
                                                innerScroll: true,
                                                title: 'Reason for Cancelled the item',
                                                buttons: [{
                                                        text: $.mage.__('submit'),
                                                        class: '',
                                                        click: function () {
                                                            this.closeModal();
                                                        }
                                                    }]
                                            };

                                            var popup = modal(options, $('#popup-modal'));
                                            $(".click-me").on('click', function () {
                                                $("#popup-modal").modal("openModal");
                                            });

                                        }
                                );
                            </script>

Controller

<?php

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

namespace XXX\SalesOrder\Controller\Index;

use Magento\Framework\App\Action\Action;
use Magento\Sales\Model\Order;

//use Magento\Framework\Controller\ResultFactory;

class Index extends Action
{

    protected $_resultPageFactory;
    protected $order;

    public function __construct(
    \Magento\Framework\App\Action\Context $context, Order $order, \Magento\Framework\View\Result\PageFactory $resultPageFactory
    )
    {
        $this->_resultPageFactory = $resultPageFactory;
        $this->order = $order;
        parent::__construct($context);
    }

    public function execute()
    {
        $orderId = 3;
        $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
        $order = $objectManager->create('\Magento\Sales\Model\Order')->load($orderId);
        $order->addStatusHistoryComment('I need to get message here');// I need to get textarea message here
        $orderState = Order::STATE_PROCESSING;
        $order->setState($orderState)->setStatus(Order::STATE_PROCESSING);
        $order->save();

        $resultPage = $this->_resultPageFactory->create();
        return $resultPage;
    }

}