There is a line I use ALL the time when I see a girl looking bored whether they,re staff in a clothes shop, bar, cafe whatever and it always gets a good response and opens up the conversation.
Me: (walking up to bored girl with a smile) "I saw you from way over there and I know EXACTLY what you're thinking!"
Girl: (smiling) "Really? What's that then?"
Me: (completely dead pan) "Kill me".
At this point the girl will start laughing and then you can move on to how boring her job is how you had an even more boring job, what does she do when she's not bored out pf her skull yadda yadda yadda!
It works (for me) every time! Try it tomorrow...I'd like to hear back if it worked for you too.
They call me Hitman.