I'll keep it short. Pause between your sentences. Don't just talk like a wall of text. You know how in reddit we hate posts with a lot of unformatted, 1 giant paragraph of text? If you talk like that guess how the other person feels. So as you're running your opener or telling your story or trying to get to know her. Talk slowly and put pauses between your sentences.

Example: I'll demonstrate with this day time opener.

You: Excuse me (wait until you have her attention)

Her: (She will either say yes or just looks at you expecting you to say something - either way is fine)

You: I know this is random (0.5s pause) but I just saw you from there and I thought you look cute (0.5s pause) so I had to meet you.

^ use this instead of saying all these as one long sentence.

tl;dr: talk slowly and put some pauses between your sentences. It will pique her interest even more and makes you look more confident.