Delta charges some of the highest change and cancellation fees among domestic airlines. Delta Air Lines also charges a $200 change fee for paid domestic flights (including to the U.S. Virgin Islands and Puerto Rico), and up to $450 for international flights.
Trouble is anything that causes difficulty, worry, and inconvenience, or that prevents you from doing something. If you have trouble getting along with a classmate, it is hard to be friendly with him or her. Whether you have trouble finding your shoes, you're in trouble with your teacher, or you go to a lot of trouble buying the kind of tea your sister likes, you face an annoying â and possibly distressing â difficulty.
A crisis (from the Greek ÎºÏÎ¯ÏÎ¹Ï - krisis; plural: crises; adjectival form: critical) is any event that is, or is expected to lead to, an unstable and dangerous situation affecting an individual, group, community, or whole society.