.......
First Name 
.......
.......
Last Name
......

##</code><code>##

open fhand,file.txt;
while(<fhand>}{

if($_ =~/First Name/){ 

    $First =1;
}
if($_ =~/Last Name/){

print"proceed" if($First = 1);
}else{
print"Order is not correct\n";
}