United Airlines just made booking easier for trans and non-binary customers

Something as simple as booking a flight can be painful if you identify as trans. 
On Tuesday, United Airlines announced that they would be changing their booking options to be more trans-inclusive. Instead of forcing their customers to choose between male or female as gender options when booking, customers can now also select U (undisclosed) or X (unspecified), corresponding with whatever it says on their identification. Customers can also select "Mx." in lieu of Ms., Mrs., or Mr. when book