It would be an exclamatory sentence
Okay, Ok, and O.K. are all acceptable spelling of "ok"
The dialogues create a sense of humor.
Explanation:
- Dr. Heidegger invites his elderly friends home to make a strange study. he gives them each plain water with old wethered rose petals in it.
- He tells them that they are rejuvenated by the fresh blooming flower. he tells them that it was from the fountain of youth. He tells them to make the mistakes that they did earlier.
- His friends believe that and wanted to wrestle with each other and behave like fools.
Every written piece comprises a central theme or subject matter. The manner in which a writer approaches this theme and subject is the tone. In this specific short story the tone is formal, sometimes informal and ironic.