I was hired to install a new water heater in a customer's home. When I arrived, I found that the customer had not shown up or answered the phone when I called. I left a message for the customer to call me back, but I did not hear back from them. I called the customer again the next day, but they did not answer. I left another message, but still, I did not hear back from them. I decided to go ahead and install the water heater without the customer's presence. I completed the installation and tested the water heater to ensure it was working properly. I left the customer a note explaining that I had installed the water heater without their presence and that they should contact me if they had any issues or concerns.