The document provides expressions for inviting, accepting, and declining invitations and appointments. For inviting, expressions include "Would you like to...", "We should be pleased/delighted if you could...", and "Would you care to...". For accepting, expressions are "That's very kind of you", "We'd very much like to...", and "With the greatest pleasure". For declining, expressions are "I'm very sorry, I don't think I can", "I'd like to, but...", and "Unfortunately, I can't...". The document includes a sample dialogue demonstrating inviting, declining, and accepting plans using these expressions.