Hi. It is good you used paragraphs to accomplish task..
Here are some suggestions,
Unfortunately, I am writing you to report a loss of my important documents, that I forgot to pick up from the place while travelling at you recently .
At the outset, please take a note that my room... Please describe simple scenario. It is bit difficult to understand right now
Like in last paragragraph also you can simply write this..
I would be grateful if you may please look into the aforesaid matter most urgently
Your Yours faithfully