Was this flirting or was it just talk?

so i was at work, and a girl came in. she asked for help like any other customer, but when i rang her up she laughed at all my lame jokes, and we made small talk, and then when she was leavin i said feel free to come back anytime, and she said "ill be sure to if youll be here, and we exchanged names and she left. she works in a neighboring store so there is a chance ill see her. Was this flirting or am i crazy.