Be hygienic, actually dress dont just put some cloths on, wipe all the smudges off your glasses if applicable, be confidence, kind, interested in the person you are interested in.
Make them comfortable, listen to them, let them know you're interested in who they are as a person, not just some thing.
If you are paying attention, you'll know when you can say specific things that will further your mission of getting a kiss or reciprocation of interest in YOU once you have timed your questions, responded positively to your interest, paid attention and shared connections or experiences that are similar to theirs or provoke other experiences of theirs.
Become friends even. Just go for it. Dont think about that being your mission.
Your mission to show someone you are actually interested in them.
Make and keep eye contact. Blink normally.
This is how show someone you are interested.
^^^ dont forget this step. Look into their eyes as if the person you are listening to is inside those eyes.