哦谢谢,给我一次机会我会做的更好,用英语怎么说啊?

one more time , be better

Thanks a lot,I will try my bset to do it well if I have the chance.

oh..thank you, if you give me another chance, I will do much better

Thank you very much. If you give me a chance, I can do it much better.

I will certainly do much better this time.我这次无疑会做的更好.（上次砸了,马上就要重试的）
I will try my best next time.下次我会全力以赴.（这次砸了,但保证下次会好）