After click the Get Started button import demo

Go To The Contact > Conatc Forms

Click edit

This is default

Copy and past and click the Save

<div class='row'>
  <div class='col-lg-6'>
[text* Name id:name class:form-control placeholder "Name"]
  </div>
<div class='col-lg-6'>
[email* E-mail id:email class:form-control placeholder "Email"]
  </div>
<div class='col-lg-12'>
[textarea* Message id:message class:form-control "Message"]
[submit id:btn-submit class:btn class:btn-contour class:btn-medium "SEND"]
</div>
</div>