I think you're confusing the term culture with the word strategy. Our employees have a similar set of values and beliefs that will not change with the introduction of a tiered fare structure or premium economy ("Plus"). I don't work on the frontline but what I do in my role has an impact on the guest experience. Giving our guests the option to get the lowest available fare; pay for the flexibility to take an earlier or later flight for free; board first; or get seats with more legroom has no impact on what I do or why I do it. Our strategy is changing. Not our culture.