Dear Felix
We are writing to express our appreciation for [STATE BUSINESS, ex. your order of ten Magna flux compressors]. [STATE PROGRESS OF ORDER/BUSINESS, ex. We are in the process of filling and shipping your order, which is expected to arrive at your premises on Friday.]
We look forward to doing future business with you, and we will jump at every chance to make your experience with us enjoyable. Please feel free to call me at XXX-XX-XX if I may serve you in any way.
Regards
Lydia