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">
<div class="form-group">
<label>Name</label>
[text* uname class:form-control placeholder "Name"]
</div>
</div>
<div class="col-lg-6">
<div class="form-group">
<label>Email</label>
[email* email class:form-control placeholder "Email"]
</div>
</div>
<div class="col-lg-6">
<div class="form-group">
<label>Subject</label>
[text* email class:form-control placeholder "Subject"]
</div>
</div>
<div class="col-lg-6">
<div class="form-group">
<label>Phone</label>
[text* phone class:form-control placeholder "Phone Number"]
</div>
</div>
<div class="col-lg-12">
<div class="form-group">
<label>Message</label>
[textarea* umessage rows:5 class:form-control placeholder "Message"]
</div>
</div>
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<div class="col-md-12 col-lg-12">
<button type="submit" class="btn default-btn">Send Message</button>
</div>
</div>