If your aim in any set is to make the girl's day, it will be beneficial for both of you.
Your intention of making her happy rather than trying to get her number, means you will have more success in the latter as a by-product. She will go away feeling pleased with herself and speak to her friends, telling them the story of this amazing guy who chatted to her on the way to work, and she's going to meet up with him later bla bla.
Also by displaying your values on a date and showing what you're all about, flicking the right switches for a girl, she will have faith in men and feel good about life. She maybe will even follow your lead and start to take interest in her own life a bit more. That dress you complimented her on... do you think she will ever wear it again in the same way? of course not, she's going to feel sexy about it.
If you can touch someone's mind, it has a lasting effect.
awww how sweet.
It also gets you sex.

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Mastery in the art of natural seduction
https://twitter.com/El_Mago_PUA