Yeah I wasn’t fan of that second response. Too gamey imo

"Fair enough. How is Thursday treating you ?"

I know it's tempting to be gamey (especially when you have Alex doing magic things over text but... at the end of the day, the goal is to meet the girl.
She expect to talk with a normal man (High value, yes, but not creepy) and the best way is to keep moving convo forward and to keep it simple (unless you have skills)

Dont think she qualifies as a brat from that response only. You played the card of boasting albeit in a funny way and she countered. Recover from it and move on with the chat. Too early to draw conclusions as to her style.

You should change the convo type too something better which will give you yes compliance so maybe go with "u are sassy too, any other of my weaknesses u have? "

She called you a kind but you punished that compliance and created an unnecessary frame battle. Take a look at some of the videos on guides on texting on the yt and my free website