How do you explain that the leader's signature is not texting?

Send text messages without the signature of the leader, as follows:

1, leader, there is a document that needs your signature. I looked for you several times, but I was not in. Would you please tell me if this document is in your office now or where to sign it?

2. Hello, leader, there is a document for you to sign now. When is it convenient for me to come to you?

3. Leader, this is a document that needs your signature. I looked for you several times, but you weren't there, so I left it in my office. I'll get it after you sign it. Thank you.