This is all better accomplished by explicitly saying all of that: "Hey, you around? I need a help with a $time-sensitive-thing" or "Hey, ping me when you're ar

This is all better accomplished by explicitly saying all of that: "Hey, you around? I need a help with a $time-sensitive-thing" or "Hey, ping me when you're around, I need a 2FA code for $XYZ", instead of just "hello".