One of your problems is that you over prepared yourself for the opener without any consideration to what would follow up next. You were bold and spontaneous, and that is why she responded to you. However, when you had your moment of indecision, she saw it and immediately lost interest in you because she saw you were being mechanical.
The ability to make decisions is incredibly important for any man, because it shows that you know what you are doing, and it demonstrates power. The moment she told you her name, you should have immediately snapped onto the next thing. As sizart said, a neg would have been great, but your thinking process backfired on itself.
The biggest problem you have is that you lack naturality. You went into the situation and ended up flopping big time because you couldn't be you. A rehearsed opener is just a rehearsed opener, it won't take you anywhere after that. With the opener you used, if you had forgotten to use a neg of course you wouldn't be able to get anywhere with the conversation because you just dove off a cliff with no parachute. It's nice to be prepared and armed with some things. If you depend on it to much, that's when you become under-prepared and over-prepared.
Remember, don't DO you, BE you.
"There is no better than adversity. Every defeat, every heartbreak, every loss, contains its own seed, its own lesson on how to improve your performance the next time." - Malcolm X