I saw this on earlier on and I want to share it as it is a great example of how to promptly react to a complaint and win a customer's heart.
Turkish Airlines passenger complained through Twitter while on-board because
apparently it was too hot.
reaction from the social media team on the ground, the hostess and the pilot (that's the most impressive thing!) was fast and positive, and won a customer that most likely would't have used Turkish Airlines any longer.
Social media at its best by a very customer oriented company.