"We don't ever take someone's favor for granted."
Expressing gratitude is a natural way of saying what you feel in your heart, regardless of size. Regardless of the size, Apologizing is also an honest confession of the regret you feel.
Everyone knows, but only a few can keep this. This can be expressed in "responsibility and promise" to the company.
We will always communicate with customers and try our best to keep promises with customers.
"We will do our job with responsibility until the end as we promised to."
Best regards, VGATE