The Britanica Dictionary defines flirt as
to behave in a way that shows a sexual attraction for someone but is not meant to be taken seriously.
In which of the following situations can we say “Bob flirts with Mary”?
Bob really likes Mary and wants to be her boyfriend.
Bob just wants to sleep with Mary or to have her as a sex partner without a serious relationship.
Bob acts toward Mary as if he is interested in having a romantic relationship with Mary just for fun, but in reality he wants neither to be her serious boyfriend nor to have her as a sex partner without a serious relationship.
When the verb flirt is translated to Vietnamese, it implies three of the above situations.
If flirt can not be used in one of the above situations, then what other verbs can be used in that situation?