Why would someone hit you up to not really conversate?

This has happened far too many times where someone hits me up and expects me to keep the conversation going, I don't get this cause they legit confuse me because I'm not one to insist if someone isn't interested in a conversation so I don't get the purpose of this, I try 3 times to get a conversation going, if they remain cold i call quits, anyone have this happen? lol
Why would someone hit you up to not really conversate?
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