### Psuedocode, mostly
#!/usr/bin/perl -wT
use strict;
use CGI;

my $q=CGI->new();

if($q->param('submit')){ 
	#The "submit" param would come from a default submit button
	#Use some other parameter if it makes sense to you, like "problem description".
	#Any field that's submitted by your form should work.
	#Print thank you page, however you want.
 
} else {
	#No parameter was submitted, so that must mean this
	#is a new request.
	#print your page for submitting the help desk request.
	#and do your post-processing.		
	
}