I take you need to write an expository essay enumerating the essential basic requirements and your justifications for the said ambition. You would start your essay with a topic sentence listing the reason why you want to be a cabin crew member. For example, 'I want to be a cabin crew member because (and then go on to give your reasons for wanting to become a cabin crew member and also identify in what capacity'. So that's what your first paragraph would be about. You will need to then expound on that topic sentence in a coherent manner in the body of the essay. Keep in mind that it should be coherent, cohesive and should follow a logical progression. You will then discuss why you should and should not go for this career option. The challenges that you expect to face and how you intend to prepare for them. Finally, you will conclude your essay and justify it as the right choice for you.
