The script we used to message Southwest to get our vouchers:
Good morning,
My family flew on [FLIGHT #] on [DATE] from [AIRPORT] to [AIRPORT]. It was delayed by [INSERT TIME OF DELAY – MUST BE AT LEAST 1 HOUR]. This delay resulted in [REASON YOU WERE INCONVENIENCED BY THE DELAY]. We really love Southwest Airlines and fly it often, but these delays were disappointing and made our travel day much more difficult. Our confirmation numbers were [INSERT ALL CONFIRMATION NUMBERS FOR ALL TRAVELERS ON YOUR ITINERARY].