Dear Sarah,
I hope you have been doing well lately! I am reaching out because I am hosting a small party at my place next Saturday, and it would be wonderful if you could join us.
I decided to organise this get-together because my sister finally finished her master's degree, and we wanted to celebrate her hard work with some close friends and family. It feels like the perfect excuse to gather everyone together after such a long time.
For the evening, I am planning a relaxed backyard barbecue. I have already ordered a mountain of supplies, and my brother has promised to man the grill while I prepare some of my famous salads. Later on, we are planning to set up a projector to show some old home videos, which I am sure will result in plenty of laughter.
I really want you there because you have always been such a supportive friend to my sister. It simply wouldn't feel like a proper celebration without your infectious energy and great sense of humour to keep us all entertained.
Let me know if you can make it by Wednesday so I can finalise the catering.
Best wishes,
Jamie