Well, I'm afraid I must be going now. I have no idea it was so late.
Stay for dinner with us.
I'm afraid I can't. I have a dinner party at seven tonight. You see, I am going to England the day after tomorrow.
Well, I won't keep you then. It was very nice of you to come to see me.
It has been a pleasure. Goodbye.
Goodbye. Thank you again for coming.