Dear Mr./Mrs.Blake,
Long time no see,how are you recently?
As my uncle will come to my home to stay for several days during the Spring Festival,we will prepare a family dinner for him.Therefore,I sincerely hope that you can attend the dinner and have fun with my family members.Of course,the dinner will be held at my home at *** o' clock.
We welcome your coming then.
Yours
*****
2.
Dear ***(朋友的名字),
Long time no see,how are you recently?
As you know that we are to leave our school,I want to take this chance to hold a graduation party in my house after our graduation ceremony.The party will be held at about four o'clock in the afternoon on June,26th,namely the coming Sunday.
Therefore,I hope that you can come to join the party.I will warmly welcome you then.
Yours
****
希望能帮上你!
……