The call comes from your friend. He tells you that the plane is forced to land at the vienna airport  because a storm is coming to Prague. 

"I'm stuck in the plane! The cabin crew hasn't informed us when the plane will be able to take off again. Sorry... don't wait for me any longer. I will contact you as soon as I know when I can arrive in Prague."

"That's terrible! Don't worry about me. Stay safe and DO NOT forget to keep me posted."