yeah, I recently got asked this question in the form of "what are you going to do?" and i said "be awesome u know the usual" and she responded with "Lol and also be modest. what are you doing tomorrow night?" to which i should've answered "you" or "drugs", but instead, i said "i don't have plans yet" and she hasn't responded yet. that's the perfect opportunity to ask to join her on something (i've taken this girl out on a date before). when a woman gives you excuses it's not because the text is bad, it's because the girl isn't interested.
look at atom smasher's quote. provided that you have basic social skills, it's completely true and it totally applies to this situation. outside of some VERY basic things, there is no such thing as text game.