I was so lucky to have the friendliest cabin attendants on my 11h flight from Santa Cruz/Bolivia to Madrid. Having been originally assigned a middle seat I had asked the attendant at the plane door whether she would kindly tell me if there was an available window seat. She came to my seat when boarding was completed and assigned me a window seat in the front of the plane, and even better, one with no one sitting next to me! The absolute jackpot for any long-haul flight, almost like a business class upgrade.
She and her colleague made my day with this nice gesture and their thoughtful attendance throughout the entire flight. A big thank-you again!