Trending @Accenture; What is best reason for raising expectation to not wfo?

My manager asked me to give a good reason to not wfo for one week

For one week, come on no need to even ask. If you have asked already say you're going to your hometown for some festival or a marriage or engagement of relative

What can I mention for 3 months exception

Your manager is a shit person then, give any of the above reasons it's fine.