Three texts from an unknown number.

I got this text out of the blue -

Thanks for coming by ;)

- and I texted back saying I didn't know who it was, then a few days later I got this -

Hey u! Hope ur having a great day.

- and when I texted back saying I didn't know who this was, I finally got a reply -

Uh oh...hope I didn't say something wrong.

- to which I replied asking them who they were, but I never got another answer.

I showed the texts to my one lawyer friend from Missouri, and she says the texts sound like something a girl would write.