Dear John, 

I regret to inform you that your employment with our company is being terminated. Your last day will be at the end of this month. This decision was difficult to make, but the company has decided it is in our best interests to pursue a different direction. 

If you have any questions or concerns, please do not hesitate to contact us. 

Sincerely, 
[Your Name]
John Smith
Componi un'e-mail a un dipendente informandolo del suo licenziamento.