To help, I wrote an example of the poem prompt you gave(Images -- should read from left to right) In the example, I used irony to show contrast and contradictory from the speaker's tone and veiw at the begining of the poem compared to at the end of the poem. I tried to incorporate a story into the poem because I figured out a good way to tell a--what is a rather mediocre--story with the given prompt. I incorporated this story into the poem simply by sticking to an ABB rhyme scheme throughout the entire thing. There are of course an endless number of ways one could write a poem, for poetry is often seen as more of a creative, expressive form of writing rather than a technical one. If you have an idea and you can manage to formulate it in stanzas, there's not much that can go wrong.