1. Direct invitation:
Hello, XXX (address), I reserved a table in XXX (date and place), and I want you to share it with me. I wonder if you are free?
2. Bring a gift:
Hello, XXX (address), I reserved a table in XXX (date and place), and I want you to share it with me. In addition, I have prepared a small gift for you, I hope you will like it. I wonder if you are free?
3. Invite in the name of the family:
Hello, XXX (address), I reserved a table in XXX (date and place), and I want you to share this family dinner with me. I wonder if you are free?
No matter which way you use, you should express your sincerity and gratitude and let your elders feel your sincerity and concern. At the same time, you can also provide some choices at the time of invitation, such as providing different restaurants or menu options, so that elders can make better choices.