Paragraph 1: Say what you are thanking the person for and how you found it. 

To the person who found my potatos thank you! I found it in the train station

Paragraph 2: Say what you were doing when you lost the item. 

I was walking to the train station when I left it and then i was looking for him.

Paragraph 3: Say why the item is important. Give some personal info or opinions. 

It's very special to me because my father bought it for me I'm mad about left my potatoes, is one of my favourite

Tanks again for everything!