I'm sixteen years old and was at a ski resort the other day. When buying some food in the cafe I realized the one cashier was an HB 9. I opened her formally and made her laugh with small talk, but i just paid and got back to my friends. I went up a few days later and she still recognized me and gave me two IOI's; she laughed at everything I said whether it was funny or not and when another guy started paying she continued talking to me and after she looked at him to collect his money she quickly looked back to make sure i was still there, and just seemed generally interested in me. I've only been in PUA for about 2 months, and I'm not sure how to open her while considering that she is on the job and much older than me (in college). How can i open and escalate into a # close or K-C?