Letters / IELTS GT: contact insurance company for the item lost [3]

Hi All,

I am preparing for the IELTS test, and here is my informal letter writing for the first writing task, could you please give me some comments? thx a lot!

On a recent holiday you lost a valuable item. Fortunately you have travel insurance to cover the cost of anything lost.
Write a letter to the manager of your insurance company. In you letter
.describe the item you lost
.explain how you lost it
.tell the insurance company what you would like them to do

Dear Sir or Madam,

I am writing to ask for the procedures I should follow in order to get compensation for my lost mobile phone during my vacation.

When I was having a trip in Malaysia, I lost my iPhone on the bus from Melaka to the airport. I tried to call the bus company to see if anyone found my iPhone, but I didn't succeed. The mobile phone I lost is iPhone6 Plus with 64G storage capacity and its color is silver. I bought it about one month ago in Apple Store in Singapore and I can show you the purchasing receipt if you need.

Since I have travel insurance to cover anything lost, may I know what kind of procedure I should follow in order to apply for the reimbursement for my lost iPhone? Can I get full or only partial reimbursement ? I try to find information from your website but I am still not quite sure what I should do.

Your timely help would be highly appreciated.

Best Regards
Tom