One of my friends was asked by his parents to book some theatre tickets on-line for them. After a few days, the parents received two envelopes from the theatre: one containing the tickets for the show they wanted to see, and another one with a letter as follows:
"Dear Mr. XYZ,
Thank you for booking tickets at ABC Theatre Internet booking service. For future reference, hereunder you will find the details of your registration with our on-line booking service:
user name: XYZ@hotmail.com
We are looking forward to seeing you on-line again soon!"