Can you Just almost list what you've put there?
Something along the lines off:
Heavenly Father, thank you for sending your son into the world. Thank You that on this day, we can celebrate his birth and remember what that means.
Thank you that we are able to spend today with family, enjoying this food and time together.
Father we pray for those who are not able to do that today. We pray for those who are lonely or haven't got enough to eat. We pray that they will know your presence Lord and that you'll draw near to them today.
In Jesus name. Amen :)