I enjoyed your story, @nahid43. The reunion of Monir with his family is very sweet. I thought I would send along some resources from our catalog of storytelling tips that might be helpful to you.
Your story is mostly told in dialogue, which is an interesting storytelling style. You might want to consider integrating more narrative to provide a bit more information to the reader. For example, it was a nice touch in the story to describe the brother and sister sitting by the window with their coffee after the rain. And it would be really good to provide a little more information about why he left.
Here are some resources to check out:
Good luck, and keep writing!