It has to be 300 words, not in old English, but in proper English, and I have no idea where to start. The conversation takes place after the play is over, and Horatio and Ophelia run into each other in a corridor of the palace. They must talk about what has been happening and what each of them thinks about Hamlet, recent events and the future. Help me.
This is an interesting creative exercise that forces you to think about Hamlet from the other characters' perspectives. Here are a few things that I think they would discuss. Ophelia would probably want to know what was going on at the abrupt conclusion of the play when Claudius stormed out. It would have been an awkward and strange occurrence. She might also ask why Hamlet spoke in such a bawdy way to her when just previous to that scene, he admonished her to get herself to a nunnery and away from men. Perhaps she thinks that Hamlet confided in his friend about his true feelings for her. She would probably express her continued concern for Hamlet's sanity, and she may even ask what the cause of the change in Hamlet stems from.
Horatio would likely keep Hamlet's confidence about what the ghost revealed and what the intent of the play was. He doesn't have any reason to let Ophelia in on any of that truth, though he may hint at Hamlet's motives in an effort to reassure her that Hamlet is going to be OK. Horatio may ask Ophelia what she made of Claudius's leaving the play. This may help him confirm what he and Hamlet understood about it. He may also ask Ophelia to be strong and be there for Hamlet in the future, knowing that he will have some tough times ahead as he attempts to avenge his father's death.