Recieved text message "Hey ;D"  Have no idea who this is.

Recieved the following from this number:

Them: Hey :P
Me: Hey who's this
Them: ;a.dd me on S.k.y.p.e .. ID is charlottechick2
Me: Who is this?
Them: sry I have no reception ;(
Me: Who is this

No response after.

Just got something similar around the same time as you

hi t
Hello
add me on y! IM  id is chloegurl9
who is this?
sry i have not reception:(

I got the same message, but it included my full name.

Them: hi "my name"
Me: Who is this?
Them: ;) a.dd me in y! IM .. id is tarynflirty
Me: No. Who is this?

Then nothing else.