Do not send blank fields via email

I implemented a service booking form using contact form 7. How can I prevent unselected fields from being sent to the customer’s email? My form is as follows:

`<div class=”row”>
<div class=”col-sm-4″>
<span style=”padding-bottom: 2em;”></span>
<span class=”products”>test 1</span>
</div>
<div class=”col-sm-2″>
<div class=”qty-count qty-count–order”>
<span class=”count-reduce”>–</span>
[text text-195 class:count-input "0"]
<span class=”count-add”>+</span>
</div>
</div>
<div class=”col-sm-4″>
<span style=”padding-bottom: 2em;”></span>
<span class=”products”> test 2</span>
</div>
<div class=”col-sm-2″>
<div class=”qty-count qty-count–order”>
<span class=”count-reduce”>–</span>
[text text-349 class:count-input "0"]
<span class=”count-add”>+</span>
</div>
</div>
</div>`
config email:

test1: [text-195]

test2: [text-349]