Dear
As we discussed in our recent telephone conversation, I have released your "pending" order on our terms of net 30 days, with payment expected on or before 30 days from the date of the invoice.
I appreciate your candor and am looking forward to getting your account back on sure footing in the not too distant future.

Dear Thank you for giving (name of agency) the opportunity to make your travel arrangements for your recent trip to (destination)
We hope that you were pleased with the air travel and the hotel accommodations that we arranged for you. We encourage your comments, insofar as that is the best means that we have for learning first hand if the representations of quality that are made to us are accurate.
We will …