Say you want to help
Start positive, then be honest about limits.
Check your capacity
Look at your schedule before promising anything.
Offer what is possible
Say the earliest date and what may need to be reduced.
Price the rush
Quote a rush fee so the extra effort is paid for.
Be clear about trade-offs
Explain any impact on quality, scope or review time.
Get a clear yes
Confirm the date, fee and scope in writing.