你不用担心，我已经准备好了。
Nǐ búyòng dānxīn, wǒ yǐjīng zhǔnbèi hǎo le.
You don't need to worry; I am already prepared.
别担心，我会帮你的。
Bié dānxīn, wǒ huì bāng nǐ de.
Don’t worry, I will help you.