easyappointments/application/views/appointments/terms_and_conditions_modal.php

<div id="terms-and-conditions-modal" class="modal fade" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h4 class="modal-title"><?= lang('terms_and_conditions') ?></h4>
                <button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">&times;</span></button>
            </div>
            <div class="modal-body">
                <p><?= $terms_and_conditions_content ?></p>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-outline-secondary" data-dismiss="modal">
                    <?= lang('close') ?>
                </button>
            </div>
        </div>
    </div>
</div>