Tell me about a time you experienced great customer care and what made it stand out?

I work in a software development company and I attend the needs of clients that use software and applications for various information technology activities. The last time I attended a client was an excellent attention because I had the opportunity to explain with details about the operation and development of the application that your company was looking for. There was a great interaction between the two and I learned from their company and the client learned from my profession and how the product he was buying was created.