这样email or call 联系原来的雇主

Hi Johnny,
How are you doing?

This is wihcr, the intern in your group five years ago.

I always remember the nice time worked in your group.
I am writting this email to let you know that I am available for a part time job again. It will be highly appreciated if you can let me know if you have the aprt time job openining.

Have a great 三八节!