Order message printed in order_conf email

[swtiris]

Hello community!

So, I am trying to print the client's order message to the order confirmation e-mail that is sent to the client but I am struggling.
I do get it although to my admin email account using mailalerts and new order file.
I just want it to be seen to the customer's order confirmation email too.
I edited themes/mytheme/mails/el/order_conf.html and inserted appropriate code below shipping address and typed {message} - {lastname} for testing purposes.
Sadly, I only receive the lastname in the order confirmation e-mail and not the message too.

Can you provide any hint?

Thank you.