For example, some girl would sms some guy - ''hey I'm bored,
talk to me''. To me, I would think ''okay, this girl just wants
someone to kill her boredom for awhile'' and don't really feel like
entertaining that friend, unless it's a really close friend.
Or some people would go ''hi, how are you?'' which sometimes I
think would be too plain follow up. Imagine how awkward it would be
receiving a reply - ''yeah, I'm fine.'' lol.
So what's your sms that kicks off a chat? 
"Leave me alone" click SEND.
Done.