Received a text message saying Hey ;D

I replied with, "Huh?"

They responded with :) A.dd me on y! IM .. id is isabellaflirty3

I replied with "who r u?"

No response since then...

I just received a text message saying "Hii !!" so I looked up the number here. I have now added the number to my contacts list as "Wrong#".

Got the following text message:
Hi ;D

I replied "Who is this?"

They responded:

A.dd me on y! IM ... sn is morganchick0

I got a text saying: heyy brendaa

I replied: whose this? Twice