I should be able to answer by the deadline.
Is that a yes or a maybe?
You are stating that you should be able to have it done, but I need a definite answer as to if you can or not.
I can do it but I don't like to ever say it is a definite because anythig can happen.
Okay, I understand, but I need to have it no later than Sunday. If you can not do it I can understand.
Yes or no?
Could you please reply and let me know if you or if you will not be able to do it, so that I can explore other options, thanks. If you can get it to me by Sunday evening that would be great, but I will need it no later than 7:00 Houston time.
I really thought that I could do it but I am really swamped so I will opt out early so you can get another expert to help you.