I will reply you your e-mails upon my return
I am currently out of the office returning on [date].
If you need assistance, please contact:
[substitute name1] at [telephone number1] or via e-mail [substitute email1]
[substitute name2] at [telephone number2] or via e-mail [substitute email2]
Otherwise, I will reply you your e-mails upon my return
[Name and surname]