<div class="form-group row">
<div class="col-xs-12 col-md-6">
<label>First name*</label>
    [text* first-name class:input-text  first-name]
</div>
<div class="col-xs-12 col-md-6">
<label>Last name*</label>
    [text* last-name class:input-text  last-name]
</div>
</div>

<div class="form-group">
<label>Subject</label>
    [text subject class:input-text your-subject]
</div>

<div class="form-group">
<label>Your Message</label>
    [textarea your-message]
</div>

<div class="form-group clearfix">
<p>[submit "Send Message"]</p>
</div>