Read the beginning of the story below and complete the story in 600-800 words.
An Unexpected Guest
Riya was terrified when she heard the news on television that an alien spaceship had landed in her city. As a precaution, her father closed all the doors and windows.
Though everyone was asleep, Riya could not sleep a wink. The thought of aliens in her city kept her mind racing. It was almost midnight when she heard the door bell ring.
By now she was really scared. She ran towards the door but her father instructed her to go back to bed. She pretended to go towards her room, but hid behind the sofa and watched her father open the door.
When her father opened the door, a human-like alien was standing outside the house, looking weary and exhausted in the faint light radiated from the house. Her father stepped back to the house instinctively. "Please don't be afraid. My name is Carson and I come from another planet outside of the solar system," Carson replied with a unusual voice, similar to the alien-like voice heared on the television. "We are not your enemies and won't do any harm to human beings."
Riya's father still did not trust him. "Our planet is being attacked by another planet dwellers and they are much more powerful than we are. Our home is almost devastated by their ruthless assault. Thousands of us are uprooted and cannot find an asylum nearby. And Earth is the most pleasant place to go, which is not far from our home compared to other inhabitable planets in the boundless universe. I lose contact with my fellows and that's why I am here all alone," Carson said genuinely without any trying.
Riya's father gained courage to greet Carson and shook hands with him. "I really empathize with your tribulation," her father said, quite careful with his words. "Can I just stay the night in your sofa because I am utterly out of strength after the trip," Carson implored. Riya's father was a person with a heart of gold who usually don't know how to refuse others. "Ok, just one night. Tomorrow you are leaving," her father said. He ushered Carson in the house and gave a cashmere blanket to Carson. "Thanky you very much, Sir. I owe you a lot," Carson said full of emotion.
Carson lied down on the sofa and began to soothe the tiredness from his muscle. Riya, who huddled behind the sofa, crept from the sofa and wanted to have a close look at Carson beacause the darkness of the night prevented her from seeing him clearly. She found he was nothing different from the homon sapiens, which gave her a great deal of courage to greet Carson.
"Hello, Carson," she said in an intentionally muffled voice because she did not want to wake her father up. Carson was startled by the sudden meterializetion of such a tiny little girl but he regained his composure in an instant. "Hello," Carson replied. "My name is Riya," she whispered. "Hi, Riya, thank you so much for letting me stay here," Carson said with gratitude. "No, you are welcome," she replied. Out of her curiosity, she could not subdue the urge to learn more about this unexpected guest from another planet.
"I always think there is no other planet where living creatures inhabit," she said. "That's not true. There are thousands of other planets in the enormous univers that are suitable for living and teeming with great wonders like Earth," Carson replied with an air of intelligence. "Really?" Riya gasped. "Yes, of course," Carson said.
"In my planet, the trees are sky-reaching; flowers never wither; seasons never change; cars can fly in the sky; our buildings can migrate on their own; everything is computerized in our lives," Carson said. "Wow, that's wonderful. I can only watch such a scene in the scientific films and I always yearn to visit such a place personally," she siad with excitement and mirth. "But almost everything is ravaged by our foes who are relentless in their barbaric invasion. And all the charm and beauty perished in their remorseless attack. It's not an easy job to restore and rebulid our home," Carson replied in melancholy.
"I'm so sorry to hear that but you can stay here so that I can hear more interesting things that I do not know," she said in a serious tone. "I will persuade my father to let you stay and you don't need to fret about it." "You are the angel and I really appreciate that," Carson replied, tears brimming up in his eyes. And Riya found that aliens also had personal feelings, which was quite different from the scenes in the film in which aliens are heartless and devoild of any emotions.
"Good night, Carson, I think you need a good rest," she uttered in the low voice and tiptoed back to her bedroom.
The sunshine slanted through the windows and the whole family was awaken. Riya jumped up from her bed and got dressed swiftly, storming out of her room just to say good morning to Carson. When she rushed to the living room, Carson was gone, with the blanket foled in square and a brief note on the top it. Riya was completely reluctant to accept that. The tears streamed down her unwashed cheeks.
The note read: "Dear Sir and Riya, you are very kind to me and I will never forget your hospitability. At 3:00 am, I recieved my fellows' message that our leader is shceming to fight back and all of us should march with each other to repel our foes away from our mother planet. As a member of the big family, I should bear the obiligation to safeguard my planet when it is in peril and jeopardy. Sorry for my leaving without advance notification. But I promise I will come back to repay all the warmth I have received here. And Riya, I will talk about the mysteries residing in the universe with you. Best regards!"
Riya simmered down, clutching the note in her hand. She could not forget Carson although they only had a several-minute talk. Time marched on and three years later, there was a familiar ring on the door in the midnight.
This time, Riya opened it.