You just killed the relationship!

It was a brief relationship. 5 minutes at the most.

We met each other, exchanged names, conversed pleasantly and did some business - then you killed the moment.

After telling you my name was Tony - you called me Anthony.

You might as well call me 7568920 (or whatever my Sky account number is), because you've now told me I'm just a number on your computer screen to you by not using the name I like.

If you care about your customer then display it with your actions and call them by their name!

You could even go a step further & record it for future use.