Cách làm cho bạn:
Hi B,
Thank you so much for your invitation. The party sounds great and interesting, I’m excited if I can come to join the party.
Unfortunately, in that day my family have to celebrate a party with my grandparents. I haven’t met my grandparents for a long time so I can’t go to your party.
It would be nice to meet up some time. How about going out for a meal then having a coffee?
I hope you’re having a great party!
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