In order to get the exact same Contact form style as the one from our demo when using the Contact Form 7 plugin, make sure you go to the plugin -> Forms and paste this exact code in the form:
[text* your-name "Your Name"]
[email* your-email "Your Email"]
[text your-subject "Your Subject"]
[url your-website "Your Website"]
[textarea your-message "Your Message"]
<div class="col-sm-12 text-right">
If you want the same style, but would like to modify the fields, make sure you keep the same structures with the bootstrap columns.