Delay in Response - Need Category Lead Approval

Dear 'Category Lead',

I hope this email finds you well. I wanted to inform you that I may need an additional two days to respond to your previous email. There is a significant project coming up during that time, and I will need to discuss it with you and obtain your approval before proceeding.

I apologize for any inconvenience this may cause and assure you that I will prioritize this matter as soon as possible. Thank you for your understanding.

Best regards, 'Your Name'