We write informal letters to people we know ( friends,relatives), and peers. The informal letter must contain:- an informal greeting such as ‘Dear/Hello/Hi’ + person's name or just ‘Hello!’-introduction: for example: ‘How are you? I'm fine, but I was really busy’, etc. and your reason of writing the letter- the main part of the letter.- the conclusion, for example: ‘ This is all for now. Write more soon‘.-informal ending, for example: With love/see you soon/best wishes/ your name. Informal letters should be written in an informal style .everyday vocabulary, contractions (e.g., I'd instead of I would), colloquial expressions (e.g., I thought I would write you a few lines...) and phrasal verbs.