No-show (noun)

A person who has made a reservation or appointment but fails to attend or arrive.

Origin:

No + show.

Examples:

1. The event had several no-shows.
2. The concert had a high rate of no-shows.
3. The restaurant had to turn away walk-ins because of no-shows.
4. The meeting had a few no-shows which resulted in a smaller group.
5. The no-shows lost their deposit.