A fictitious exchange based on actual events:
DAD: Hey Son, we’ve got trail work tomorrow (Saturday) at 9am. Trail cleanup for the Town trails.
SON: But Dad, I can’t. I’ve got [So & So’s] birthday party tomorrow.
DAD: At 9am?
(Son heads off to school. An hour or so later Dad returns from his run. Mom and Dad chit chat.)
DAD: Oh – by the way – there’s Town trail work tomorrow. Son says he can’t make it due to [So & So’s] birthday party.
MOM: Oh – the video game, supper and sleepover one?
DAD: Not 9am?
MOM: Not 9am.