"Ask what makes you come alive and do it, because what the world needs is people who have come alive."
"Our doubts are traitors, and make us lose the good we oft might win, by fearing to attempt."
"No one gives it to you, you have to take it."
Just do what Bill Paxton did in True Lies, pretend like you're a spy and give her your briefcase to hold. You will contact her later with further instructions.
You have to have some stones to walk up and say either one of those. Your BL and facial expression have to be spot on to pull it off.
You do both of those correct and assuming she is truely there alone I think you will be gold. Not every girl but a lot of them will appreciate your boldness.