Why? (I have to take the title longer so heres this stuff in parentheses)

So, I met this person a few days ago, just a friend but we never talked -.- it would be as simple as "hey, how are u?" and a little bit more convo after that.

Well I was busy and they messaged me, I didn't see it..A minute later they pinged me 10 times -.- like dude, I was busy like goddamn, we barely talk either way.

So why the hell ping me multiple times just for a small, 2 or 3 minute convo -.-