Warm reply
Thank you so much for inviting me. I would be delighted to attend and look forward to celebrating with you.
Enthusiastic and polite ways to confirm attendance. Choose the tone that fits your situation, then copy and personalize it.
Thank you so much for inviting me. I would be delighted to attend and look forward to celebrating with you.
Thank you for the invitation. I am happy to confirm that I will attend.
I would love to come! Thank you for including me. I am really looking forward to it.