Dear British Airways,
I have all this money here, and I’m wanting to spend it on you. Why, oh why, are you making this so difficult?
Why are you allowing me to choose a city for my departure when you don’t even fly out of that city? If you don’t fly there, and your route map clearly shows you do not fly there, don’t let me choose it as my departure city!
Stop getting my hopes up like a bad prom date. Why not offer me a departure city of Funkytown, arriving on Mars?