As of now, I can't assure you to attend this interview. Please schedule it to later.
Please suggest it as polite and formal way.
I am assuming that you are responding to someone who wishes to attend an interview with you; and that you wish that person to pick a later time or day. "At the present time, I cannot assure you will be able to attend this interview. " OR: "Presently, there are no vacancies at your chosen time.
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I am assuming that you are responding to someone who wishes to attend an interview with you; and that you wish that person to pick a later time or day.
"At the present time, I cannot assure you will be able to attend this interview. Please suggest a later time."
OR: "Presently, there are no vacancies at your chosen time. Please suggest an alternative time to attend."
I think you may be trying to say this:
I'm sorry that I will not be able to attend the interview at the scheduled time. I would be grateful if we could reschedule it for a later time.
CJ