Hi,
To add Staff Assigned in ticket replies, you have to do some modifications in code:
1. Add code:
$_ticket["staff"] = $_SWIFT["staffcache"][$_ticket["ownerstaffid"]]["fullname"];
Below
$_ticket = $this->ticket;
and
$template->assign("staff", $_SWIFT["staffcache"][$_ticket["ownerstaffid"]]);
below
$template->assign("ticket", $_ticket);
In function "loadTemplateVariables" listed in "functions_ticketmain.php"
2. Add language phrase with code : "arstaff" and value : "Staff Assigned" from Admin CP -> Languages -> Manage Phrases -> Add phrase.
3. Now modify email_staffreply template and add <{$language[arstaff]}><{$ticket[staff]}> as below
<{$language[ticketdetails]}>
===================
<{$language[articketid]}><{$ticket[fticketid]}>
<{$language[ardepartment]}><{$ticket[department]}>
<{$language[arpriority]}><{$ticket[priority]}>
<{$language[arstatus]}><{$ticket[status]}>
<{$language[arstaff]}><{$ticket[staff]}>
<{/if}>
I suppose this will fulfill your requirement

.
Thanks.
Regards,