Dear Prof.Chen,
I am writing to make an apology for having broken the appiontment we've fixed.It was yeserday that i was caught up in a traffic jam .I was drving my car near a corner when a man disobeyed the the regulations and crossed the road illegaly .All is what you can imagined .I knoced him out ,and took him to the hositpital.As a consequence ,i failed to meet you yesterday.I am feeling very sorry for this .I was wondering whether we could make it another day .I possible ,i wish we could make it at 8 pm tommorrow.Thake you !
Yours
Conan