Take care,
I'm having a party on Friday. We're going to have a band. I hope it's not too noisy. Please join us.
Dear Teacher,
See you then.
I can't come to class tomorrow. I have a fever and a headache, so my mother is taking me to the doctor.
Hi Steve,
I'm having a party on Saturday night. Everybody's going to be there. Hope you can make it.
Dear Neighbor,
Best regards.