One possible version:

Dear Mrs. Green, 

    I’m going to the airport to meet my cousin, after which I am taking him to Holiday Inn for accommodation. I will be back after dinning out with him. I have already fed the cat, so there is no need for you to worry about it. Another thing I have to remind you of is that I have received a parcel for you from the USA, and I’ve laid it on the dining table near the refrigerator. And Mr. Green made a phone call, saying that he felt sorry for not being able to have supper with the family because of an unexpected meeting. You can ring him back if necessary.