So there is this cute girl at my favorite Café and I would like to befriend her, later maybe even turn things sexual but thats not the priority in the near future.

I am not looking for a long term girlfriend... for starters I would just like to exchange a few words with her everytime I go there to buy some coffee and I would like to keep it slightly flirtatious, maybe make her giggle and generally just make her day a little better when we interact.

Do you have any tips or routines for flirting with cashiers? I would like to avoid the same cliche things other men usually talk about like weather or how good she looks. What do you usually say when you want to impress a cashier? I find it harder than flirting with other girls because cashiers are difficult to read. I mean it's part of their job to be friendly and smiling and nice to the customers so I find it much harder to recognize their honest indicators of interest.