Mrs. Smith:
"I'm so sorry we can't. We are dining with Mabel."
"We have people coming here."
Invitations to a house party are often as not telephoned:
"Hello, Ethel? This is Alice. Will you and Arthur come on the sixteenth for over Sunday?"
"The sixteenth? That's Friday. We'd love to!"
"Will you take the 3:20 train? etc."
