Dear Chris,
I feel terribly sorry that I cannot go to Yunnan in July with you as planned. The reason is that my left foot was injured. I fell off my bike yersterday when I was on my way to school,and the doctor insisted that I should stay in bed for at least two weeks.
Can I suggest / Is it possible that we put it off until early August? Please allow me to say sorry again. I sincerely hope you can understand me. And I’m looking forward to seeing you soon.
Yours,
Joe