Some people are indifferent to strangers. Generally speaking, on the plane, flight attendants are directly addressed by "hello" and "er".
Some people, frivolous, will call the stewardess "beauty".
There are also some older, more traditional and conservative people who will call flight attendants "little girls".
Of course, some people don't mention them directly. If they need to find a flight attendant, just add "hello, excuse me?"
Originally, it was the best choice to call "Miss", but because the word was occupied by a certain occupation, it was not applicable because it was ambiguous.
In fact, according to the custom of China people since ancient times, some young women are called girls, but I just don't know why more and more people don't use this word. It may be tacky, or it may be hard to shout.
So there is really no way. Let's start with "hello".
Generally, flight attendants are beautiful girls in their twenties and thirties. If you are a child, at least you have to call them sister. If you think you are about the same age as others, you should also call them sisters. After all, you should show respect for others. If you feel a few years older than others, you have to call others little sister or something. In fact, this age group is the most difficult to call. If you have a big family, you can call them little girls! If you are a foreigner or a flight attendant is a foreigner, say sorry!