I don't appreciate threw ting texts, and I won't them to stop

Received a text message from 339-237-5892 "Hey :)" I didn't recognize the number then they sent another tezt " Let's catch up on yahoo IM screen name courtneygirlie" of course I didn't do it..I simply replied I don't know who you are.  I didn't get a response.

Got a text from this number, also.  "Hey :p".

I got the same messages, this is the seccond day "it" texted me. Who is this person? Is it a rouge chattimg program or what? I dont have the time to deal with this. Someone needs to stop this person from texting random people. The number is: 1(339)237-5892. Somebody deal with this i have to concentrate on finals and midterms and not a random person who is doing this kind of thing.