At least the driver at the airport created Customer Delight for your daughter! You give a clear example that Delight is different for all of us. And if you find the code to a persons desire, you really create something beautiful!
Remember we were at the car dealer a few weeks ago? I was considering to have the navigation software in my car updated, but decided -because of price, € 300- to leave it for a while. Until Ruben, the sales executive, offered to wash my car. You know that I prefer to do that myself (although he did a very nice job), but the effect was that I immediately changed my mind and asked if they could update the navigation as well: when someone does something nice for you, you want to repay with interest!
So when we talk about ROI of Customer Delight, it can be quite quick and substantial!