Below mentioned code is not working 

```
function yourModuleName_form_alter(&$form, $form_state, $form_id) {
  if ((strpos($form_id, 'contact_mail_page') === 0)) {
    $form['reset'] = array(
      '#value' => '<input class="form-button" type="reset" value=" Reset " />',
      '#weight' => 1001,
    );
  }
}

```