View the list of Sample Business Letters Letter to Customer Not Home for Service Appointment Disclaimer: Be aware that some of these sample letters have legal, financial, or other implications. If you are not sure about the use of any letter, consult with an appropriate professional first. Letter to Customer Not Home for Service Appointment Dear On (date) our serviceman came to your home to install your new (product) and found that there was no one there. This was the date that we had arranged for installation, but I know that things like this can happen. I would appreciate it if you will call me at (telephone), so that we can arrange a convenient time to have this work done for you.