I would say maybe a narrative poem. If you want to capture the moment of when you saw a shooting star, then maybe you should tell it like a story but poem form.
She should persuade her audience by including benefits of the trip to Washington D.C, historical facts, and locations. Also, New York can be used to compare to Washington D.C, so there is more opportunity to persuade the audience in going to D.C. I hope this makes sense, i may just me terrible about explaining, but i hope i kinda helped