Dear Nikhil,
This is to be done on ur own creativity and skills. However, I'm providing u the way to the format and some examples which will help u..
You can follow the steps given below for email-writing:
Open ur dashboard >> study >> subject english >> writing section >> E-mail
Here, u'll be able to see all the things available in writing section, (with introduction, and examples).
All the best for ur studies..
Plz thumbs up if it helped.. :)
