Ok now that the title has got you let me explain a more rational take.

You should say exactly the same scripted responses to all your dates and keep notes of responses. You can do so by simpy making an audio recording of the entire date.

You review how your script was reacted to.

Change it accordingly and try again.

Iterative social design for the purpose of maximising romantic sucess.

By saying different things to different people you change the conditions of the experiment or date and thus remove knowledge about what actually generally works.