Hello (friend name)! I just entered a writing competition for the local radio station. I am so excited! My name will be all over the radio and so will my paragraph! I hope to win. Wish me luck! - (your name)
Greetings [Insert friend name here], I am glad we get to talk again. Reason for me contacting you at this time of day is because I have in fact been accepted to enter a writing competition for the local radio station. I was elated to hear this news and thought you might've wanted to hear about something this exciting. I'll try my best to win this competition for you, wish me luck!