Here is the Contact Form 7 template and source code for the Contact form.
To edit this form go to Contact> then edit your targeted form
<div class="row">
<div class="col-lg-6 col-md-6">
<div class="form-group">
[text* fname class:form-control placeholder
"Your First Name"]
</div>
</div>
<div class="col-lg-6 col-md-6">
<div class="form-group">
[text* lname class:form-control placeholder
"Your Last Name"]
</div>
</div>
<div class="col-lg-6 col-md-6">
<div class="form-group">
[email* email class:form-control placeholder
"Your Email"]
</div>
</div>
<div class="col-lg-6 col-md-6">
<div class="form-group">
[text* subject class:form-control placeholder
"Subject"]
</div>
</div>
<div class="col-lg-12 col-md-12">
<div class="form-group">
[textarea* message rows:5 class:form-control
placeholder "Message"]
</div>
</div>
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<div class="col-lg-12 col-md-12">
<button class="btn default-btn"
type="submit">Send<span></span></button>
</div>
</div>