A：Hello, Bobby ,It seems that I can't arrive at your home by 12 o'clock.
B：What happened? We're all expecting you , Hans , Dick , Archie...
A：I'm so sorry,I've been held up by the damn traffic jam for half an hour.I'd have arrived but for that.
B：I see. Where are you now,Li?
A：Thirty meters ahead is the Waterloo Bridge.
B：It's not far away from home, It's -let me see – about 20 minutes'walk,Can you walk here?
A：I've thought of that,but what can I do with my car?If only I had taken a taxi!
B：That's too bad,But don't worry.We'll put off dinner till one o'clock.
A：I'm so terribly sorry to keep you waiting.
B：It doesn't matter.Bye.
A：Bye.