"What's the best way to get to New York Penn Station?"
She gave me directions and told me to purchase a ticket ($15) before I boarded the train. I thanked her and started to walk away. Then I remembered something and turned back to her.
"Sorry, one more question, can one purchase a return?"
She stared at me as if a small but perfectly formed baby had sprung out of my forehead. "Ummmm...no, I don't think you can do that."
I apologised, thanked her, apologised again and left.
Help me, I can't speak American any more.