I'd agree with Brett, although (I don't know how old you are), but if you're still in high school or college it can be fun to incorporate some magic into asking someone to a dance/prom. One of my magical friends attempted to do David Blaine's trick where he spills water on the cement and a randomly selected word is spelled out still dry, but he had it spell out "Homecoming?". Unfortunately, it failed miserably.
But if you're asking someone out to perhaps begin a lasting romantic relationship, I'd keep magic on the backburner. You want them to first know you as a person, not just a magician. When they think of you, they should think "Dominic, the cool person who also does magic" and not "The magician, I think his name starts with a D, but I'm not sure..."