When opening and Closing Conversations

[from StudioClassroom]
Usually the person wanting the dialog to end gives verbal signals.

It is polite to respond to these signals called "preclosings."
If someone ignores them and does not help close the conversation,
a stronger pre-closing can be used.

Here is a list of statements you can use to show that
you are ready to end the conversation:
* Well, I'm afraid I have to be going.
* I really must go now. (stronger)
* Well, it's getting late.
* It's been a pleasure talking with you.
* It was nice seeing you. (note past tense)
* I know you are busy, so I'll let you go.