Minor

resources/views/app/patient/send_email.blade.php

@@ -51,7 +51,7 @@
             </div>
             <div class="form-group">
                 <button class="btn btn-primary btn-sm" submit>Submit</button>
-                <button class="btn btn-primary btn-sm" cancel>Cancel</button>
+                <button class="btn btn-secondary btn-sm" cancel>Cancel</button>
             </div>
         </form>
     </div>