I want to change page title in child theme for contact-us page. But when I'm trying to override file Magento_Contact/templates/form.phtml in my child theme from parent theme then on frontend the page showing blank. I also copied layout/contact_index_index.xml and all other templates too, still template file overridden not working.
How do I override Magento_Contact/templates/form.phtml?
My Parent theme contact_index_index.xml
<?xml version="1.0"?>
<!--
/**
* Copyright © 2015 Magento. All rights reserved.
* See COPYING.txt for license details.
*/
-->
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="1column" xsi:noNamespaceSchemaLocation="../../../../../../../lib/internal/Magento/Framework/View/Layout/etc/page_configuration.xsd">
<head>
<title>Contact Us</title>
</head>
<body>
<referenceContainer name="page.top">
<block class="Namespace\Theme\Block\Template" name="google_map" template="Magento_Contact::google_map.phtml"/>
</referenceContainer>
<referenceContainer name="content">
<block class="Namespace\Theme\Block\Template" name="contactPage" template="Magento_Contact::contact_page.phtml">
<block class="Magento\Contact\Block\ContactForm" name="contactForm" template="Magento_Contact::form.phtml">
<container name="form.additional.info" label="Form Additional Info"/>
</block>
</block>
</referenceContainer>
</body>
</page>