Answer:
Titanic (1997)
Introduction: Jack and Rose meet on the Titanic, and a romance begins to blossom despite the difference in their social classes.
Rising action: Jack and Rose fall deeper in love while dealing with disapproval from Rose's fiancé and societal pressures. Meanwhile, the Titanic is heading towards an iceberg.
Climax: The Titanic collides with an iceberg, and the ship begins to sink. Jack helps Rose get onto a floating door, but there isn't enough room for him, and he ultimately dies from hypothermia in the freezing ocean.
Falling action: Rose is rescued and begins a new life without Jack, but she never forgets him or the impact he had on her life.
Denouement: An elderly Rose throws a priceless diamond into the ocean and imagines reuniting with Jack in a dream-like sequence.
To change the ending of Titanic, we'll need to make some changes to the climax and falling action of the movie.
Here's one possible alternative ending:
Climax (revised): As the Titanic sinks, Rose and Jack are unable to find a way to escape the ship. They are trapped in a lower deck, and it seems like they will die together. However, they discover a small escape hatch that leads to the ship's boiler room. They crawl through the narrow passageway, and just as they are about to escape, they hear the ship break in half. Rose and Jack are separated, and Rose believes that Jack has died.
Falling action (revised): Rose is rescued by a lifeboat and eventually makes it to New York. She mourns Jack but knows that he would want her to move on with her life. Months later, while walking in Central Park, Rose sees a man who looks just like Jack. She follows him and discovers that he is, in fact, Jack's identical twin brother who had been living in America. Rose is shocked and happy to see him and realizes that Jack's spirit lives on in his brother.
Denouement (revised): In the final scene, Rose is an old woman living in a retirement home. She is surrounded by her family, including Jack's brother, who has become a beloved member of the family. As Rose looks out the window, she sees a vision of Jack, smiling at her from the other side. She knows that he is at peace, and she is finally able to let go of her past and live the rest of her life in peace.
This revised ending still keeps the central romance between Jack and Rose and the tragedy of the Titanic sinking. However, it offers a more hopeful and optimistic resolution for Rose's character, allowing her to find a new love and move forward with her life while still honoring Jack's memory.