Hi Meena! After every piece of information, end the sentence with a period. That'll make correct grammar and clear organization:
I am writing a letter to make a reservation in your hotel. My name is Suellen Malathion, and I am from the UK.
Also, whenever you start a sentence this way, use "XXXX and I..."
My family and I decided to spend vacation in your hotel. It will be for three days and two nights, and we will arrive on July 3rd early in the morning, around 6am. We're a family of four. I will be happy if you will check the availability and email me all details regarding your hotel service.
I need to know the room rate for this date, and we need to see a photograph of the view from the room if possible.
We would prefer a room near beach, because my children will enjoy that. I want to know some more information about food and shops, or if any good package deal is available for families. It will be great news for me if you have a water park somewhere near you, because my children are very excited for water games which are famous in your city. I want to schedule some activities during this trip. We are eagerly waiting to hear from you.
Okay.. this had a lot of errors, and if you are willing to spend some time typing I think you can learn a lot from this. Do you have time to type every sentence 10 times and speak it aloud 10 times? You can improve your skill if you practice typing these sentences and ask questions if you get confused.
Thanks for participating here!