looking forward to /for interview timings [closed]

One looks forward to something but not forward for something. In your case, you can write I look forward to the interview since the interview has been scheduled. Otherwise, it is customary to say I look forward to hearing from you.

"I look forward to the scheduled Interview" is grammatically correct, but to me (as a native British English speaker) it doesn't feel natural. I wouldn't include the word "scheduled". It's unnecessary - what other interview would you be looking forward to other than the one that's scheduled?

Sounds like it's a phone or Skype interview and they've emailed asking you to be available at a specific time. If so I would reply: "Thank you for your email and I confirm I will be available for interview on [date] at [time] [+ whatever else you need to confirm, phone number etc]. I look forward to speaking to you then" [or "on Tuesday" etc].