I met a girl, she gave me her number, what do I do?

Messi10
I work at a restaurant, and as I was serving this beautiful girl, she gave me couple of dirty winks and smiles and other gestures, with me replying with flirty smiles and looks. She was with a guy that looked very sloppy Nd as if she wasn't interested in him. Right when they were leaving, she grabbed a pen, a business card of my restaurant, and wrote her number for me. She folded the paper, and handed it into my palm saying: "sorry the writing is a little messy..." and left me the note saying: " her phone number, her name and call me sum time"

what is the best thing for me to do as I kinda like her. Should I wait a little or call right away? Please. Help
Updates
+1 y
Wat should I talk about?

Should I be worried tht I it's a prank or flop
I met a girl, she gave me her number, what do I do?
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