Hi! I have received a return offer after my internship and accepted it during that time. I signed the offer letter and luckily it is not a contract where I must stay in the company. The offer letter also mentions that they can fire me anytime or I can leave anytime.

Recently, I got an offer from my dream company. So, I want to decline the accepted offer from my internship company. I did some googling, but is still struggling on how to email them in a proper way. If anyone has gone through the same situation or know any helpful tips, I would appreciate it if you can share it here. ^^ Thank you!