What matters more? What you said you'd do, what you hoped to do, or what you did?
In a service situation, each delay can mean many unsatisfied customers, each one telling many more.
Making an honest mistake is acceptable. Failing to fix it is not.
The cutting edge of service is always being honed and polished.
If you want to interest people, make them think. If you want to inspire people, make them feel.
Enjoy your work so that others may enjoy the results.