Dear Stella,
I'm so sorry for missing our appointment last week to discuss your thesis paper. I left on the bus very early that morning, but on the way there, a car small car collided with the bus and my right hand received a severe injury in the process. I was immediately sent to the hospital for treatment, and I'm currently still recovering. I'm afraid I won't be able to meet with you in the near future, but we can discuss your paper over Email. Please send me all the relevant materials. I will take a look and get back to you.
Best,
Li Yong