How to delay the consideration of an offer?

Hello, you can say this to that company:

Hello, thank you very much for the company’s recognition. I am also very honored to get the company’s OFFER, but because I went to The handover of this job has not been completed, so I can't go to the company to sign a contract for the time being. I cherish the opportunity to apply for a job with you. I hope you can give me 2 weeks to fully prepare for my previous job, because I I think this is my personal unshirkable obligation. I not only hope to complete it, but also hope to do it well. Moreover, the boss of my previous company also appreciates me very much, so I sincerely request that you give me 2 weeks to complete my handover task. As long as the handover is completed, I can go to the company the next day after signing the contract and integrate into the company's collective in the best possible way. Thank you.