A Leave Memo - Format

Greetings,
I am blogging this memo as I just wrote it for a member in this community. Tell us how do you write it differently:
This is to request you for granting me day's leave tomorrow . Please do consider this as I need to be with my family on an urgent requirement. I will be available on mails and phones.
Regards,
(Cite Contribution)

Hello Mam,
Please find the following for leave memo. Guide me if any changes needed.
Dear Sir,
This is to inform you that I would like to apply for the leave from ……… to ……….. for …..(reason for leave). Kindly grant me leave for …. day/s.
Once I resume my work, I will try my level best to complete the pending work in my absence. I hope you have that confidence and trust in me. I would be grateful, if you sanction me the leave.