adding values to a different column after button click - php

Question

I have a page where users can view the tickets they sent, they can cancel it as well, here's what it looks like:
What I want to happen is that when I click on the "Closed: Cancelled" button. It would show "Closed: Cancelled" in the assignee column as well. Currently this is what I only get when I click the button:
Here's my form:
<div class="container">
<div class="page-header">
<h3>My Tickets</h3>
<div class="table-responsive">
<table class="table">
<tr>
<th>Employee Name</th>
<th>Time</th>
<th>Priority</th>
<th>Assignee</th>
<th>Subject</th>
<th>Problem</th>
<th>Status</th>
<th></th>
</tr>
<?php
include ('database.php');
$result = $database->prepare ("SELECT tickets.* FROM tickets INNER JOIN employee ON employee.id = tickets.employee_id WHERE employee.username = '".$_SESSION["VALID_USER_ID"]."'");
$result ->execute();
for ($count=0; $row_message = $result ->fetch(); $count++){
?>
<tr>
<td><?php echo $row_message['firstname']." ".$row_message['lastname']; ?></td>
<td><?php echo $row_message['time']; ?></td>
<td><?php echo $row_message['priority']; ?></td>
<td><?php echo $row_message['assignee']; ?></td>
<td><?php echo $row_message['subject']; ?></td>
<td><?php echo $row_message['problem']; ?></td>
<?php if ($row_message['status']) : ?>
<td><?php echo $row_message['status']."".$row_message['assignee'];?></td>
<?php else : ?>
<td>
<form method="post" action="update-ticket-status-emp.php">
<input type="hidden" name="ticketno" value="<?php echo $row_message['ticketno']; ?>" />
<input type="submit" name="closedcan" value="Closed: Cancelled"></input>
</form>
</td>
<?php endif ; ?>
</tr>
<?php } ?>
</table>
<button type="button" class="btn btn-primary"><i class="glyphicon glyphicon-arrow-left"></i> Back</button>
</div>
</div>
</div>
</div>
</div>
And here's the exec code:
<?php
if(isset($_POST['closedcan']))
{
$msg = "ClosedCan";
$status = $_POST['closedcan'];
$assignee = $_POST['closedcan'];
}
$ticketno=$_POST['ticketno'];
$con = mysqli_connect('localhost', 'root', '');
mysqli_select_db($con, 'companydb');
$sql = "UPDATE tickets SET status = '$status' WHERE ticketno = '$ticketno'";
if(mysqli_query($con, $sql))
header("refresh:1; url=view-tickets-emp.php?msg=$msg");
else
var_dump(mysqli_error($con));
?>
PS: I know mysql is deprecated, I will change it eventually when I figure this out.

Answer 1

Modified the query in the exec code:
$sql = "UPDATE tickets SET status = '$status', assignee = '$assignee' WHERE ticketno = '$ticketno'";