Create page with specific template using plugin

i am creating wordpress plugin for my own contact us page. in that i am creating one contact us page when plugin activated.

my code is

 function createPage()
{
 global $user_ID;
 $page['post_type']    = 'page';
 $page['post_content'] = 'hello this page created by plugin';
 $page['post_parent']  = 0;
 $page['post_author']  = $user_ID;
 $page['post_status']  = 'publish';
 $page['post_title']   = 'Dynamic page';
 //    $page = apply_filters('yourplugin_add_new_page', $page, 'teams');
 $pageid = wp_insert_post ($page);
 }

and it’s working fine. it’s creating new page also. now my question is i want to assign specific template to this page. i don’t know how to do it..

can you please suggest me how to do it?

Thanks in advance