去找外国老板签字进办公室应该怎么说(英文)

1.Can I have your time ?I'm sorry to use your some time for the signment.

2.May I come in?等他同意你后，说Are you free,boss? 再等他说有空，你说
I'm sorry to trouble you on the matter of signing.

Do you have free time now? I would like you to sign the document. It's very urgent. Thanks for taking your time.

敲门 say:"excuse me~!may i come in?"