It depend on where you live. Some states are "employment at will" states. In those states you can be fired for any reason, except for ones prohibited by federal laws. You can't be fired for being old, sexual orientation, etc... Watch American Beauty and the next time you turn the tables on them for severance. Also, you could say that they needed only 3 by the text and by the time that you saw it, 3 people replied. texting is not a real form of communication, so tell your boss that if he wants you there, then he should call to make sure that the message is received.