The text message reminded the leader that he had asked for leave.

Your leader didn't reply after receiving the text message, and he didn't provide evidence to prove that he didn't approve the defendant's leave. You have fulfilled your resignation procedures. The company terminated the labor relationship between the two parties on the grounds that the defendant was absent from work for three consecutive days, which lacked factual and legal basis. The company should resume the labor relationship with the defendant.

Short messages can be used as evidence and have universal legal significance.