American Airlines CEO Says Feels "Really Good" About Q3 Revenue Guidance Of 16%-19% YoY Growth; Says Vast Majority Of Current Revenue Gains Can Be Retained, Expects Performance To Be Durable; Says Revenue Strength Broad-Based Across Domestic, International, Front Cabin And Coach; Says Airline Has Recaptured "A Tremendous Amount" Of Higher Fuel Expense Through Revenue; Says From A Co-Brand Perspective, We're Looking At Cash Regeneration Of About $8B This Year