LISTENING

An old lady wanted to fly to Denver but she couldn't go above the altitude of 4000 feet over the sea level. So, before the boarding, she wanted to have the guarantee that the pilots wouldn't exceed that limit. Despite her arguments, the airport clerks didn't consider her demand. At last, they fetched a pilot. She told him that her doctor had said it was dangerous to exceed 4000 feet over the sea level for her. The pilot protested patiently and said Denver itself is 5000 feet above the sea level. Therefore, the lady cancelled the flight. She added also she always assumed Denver was on the ground.