Script 01 · Running late today
Hi [Client name], it's [Your name] — running about [how long] behind today, so I'll be with you closer to [new time]. Sorry for the short notice, and thanks for bearing with me.
Why it works Send this the moment you know you will be late, not at the original start time. The client gets a real window to plan around. Otherwise they face a no-show they have to chase.