WordPress Plugin Contact Form 7 Populate Fields from Session

[sunziun]

Hopefully someone can help me solve with this "easy" problem!

I'm looking for a way to populate data in a Contact Form 7 (WordPress) from session.

The session will be started by clicking on a book now button like this:

<?php session_start(); if(isset($_GET['bookingdate'])) {    $_SESSION['started'] = true;}?><a href="?bookingdate"> Book now </a>

After clicking the button and the session is started I want to redirect to the form "booking " page and populate one of the fields with the booking date.

The visitor will fill the rest of the form and submits. After submission the session will be destroyed.

Would that be possible when using Contact Form 7 and WordPress?