,
How To Write An Email To Reject An Interview. Give your notice as soon as possible. And again, the goal is to politely turn down the job interview, but keep the door open without burning bridges.

If feasible, try to cancel your interview at least a day in advance. When you’ve decided to cancel an interview, you should contact the hiring manager as soon as possible. If you are at all uncertain about whether you should decline the interview, it's a good idea to get a second opinion from someone you trust.