Austin Parker,
1234, West 67 Street,
Carlisle, MA 01741,
Cell:-(123)-456 7890
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Austin parker,
As you will no doubt remember I recently brought a new van from yourselves. Since then it has broken down twice, and is integral to my business. I have been given assurances that the van will be fixed by next weekend, this is not good enough and I am losing money because of this delay. As such I feel that an earlier repair is required, and will phone tomorrow to confirm an earlier slot. Many thanks.
Sincerely,
Paul smith