I was a home service technician who was called to a customer's home to install an air conditioner. When I arrived, I found that the customer had already purchased the air conditioner and had the necessary tools to install it. However, the customer did not have the necessary card processing equipment to complete the transaction. I waived the card processing fee for the customer and completed the installation. The customer was very grateful for my help and was impressed with my professionalism. I was able to complete the installation in a timely manner and the customer was able to use their air conditioner without any issues. Overall, it was a successful installation and I was happy to be able to help the customer.