the person is unable to attend or respond.
Instead of calling her right back, a person can pull a Mad Radd and wait until she is at work to call her and leave a message (to appear like a loyal friend).
2.) Someone you may think is boring may continually ask you to hang out. You find out that person is vacationing next weekend.. which is precisely when you ask that person to grab a drink. “Oh darn, you’re out of town? Too bad…..”