Write a letter to the station master, Anand, informing him about the loss of the suitcase which you realized only on alighting at Anand. You travelled by Navjivan express from Chennai to Anand. You are Priya/Prasad of 12, Kasturi Bai street, Chennai-20.

Hint: Unlike the format for an informal letter, it is important that one should clearly mention the sender’s as well as receiver address properly. There is often a distinct difference in salutation when writing formal and informal letters.

Complete answer:
12, Kasturi Bai Street,
Chennai- 20,
Tamil Nadu

August 8, 2020

The Station Master,
Anand Railway Station,
Tamil Nadu

Dear Sir,

Sub: Concerning the loss of a suitcase

This is to inform you that I, Priya, have lost a suitcase while travelling from Chennai to Anand by Navjivan Express earlier today. I lost the suitcase in between the two stations. The suitcase has an attached name tag with my address on it. Kindly look into this matter and do suggest as to what I should do further regarding the same.
I, sincerely, hope to hear a positive reply from you as soon as possible.

Thank you.
With kind regards,
Priya

Note: It is important to mention the subject with relation to your problem or issue since that is what the receiver observes first.