Format email to ask employees if they want Janmasthmi holiday or 4 days holiday on Diwali?

How to write a mail to all employee to get a feedback. topic - you want janmasthmi holiday or 4 days holiday on diwali
if you want 4 days holiday on diwali so we have to cancel janmasthmi holiday. if you want janmasthmi holiday so you all get only 3 holiday on diwali
so how to write this mail in proper and attractive way.

Try polling using surveymonkey or google forms