Reiterating the presenter's name while concluding the speech/presentation.

Dear teachers,

I would like to remind the audience of my name again when I conclude my speech or presentation.
Could you please let me know more expressions to do that?

My idea is as follows:

[1]
In conclusion, you have to plan for your retirement, not 5 years from
now, not 10 years from now, but right at this moment.

I am David Kim, and Thank you for listening.

[2]
Let me close with three brief thoughts about urgency, participation,
and growth.

Thank you for your attention, and it was David Kim.

[3]
Last but not least. I would like to encourage all of you to go out and
make a difference in this world. I wish you all good luck in your
future careers.

David Kim presented and thank you for listening.

What do you think of them above?

It would be highly appreciated if you could let me know more expressions.

Thanks and best regards,

David Kim