1. Go to your setting form like example
2. Use the Contact Form 7
3. Go to Form setting and put the below code like image

<div class="form-input"><i class="icon-vcard"></i>Name
[text* your-name]
</div>
<div class="form-input"><i class="icon-mail"></i>Email
[email* your-email]
</div>
<div class="form-input"><i class="icon-phone"></i>Phone
[tel tel]
</div>
<div class="form-input"><i class="icon-newspaper"></i>Subject
[text subject]
</div>
<div class="form-input form-input-last"><i class="icon-pencil"></i>Your Message
[textarea your-message]
</div>
[submit class:button-default "Submit"]