You're welcome & Not at all - 有咩分別?

You're welcome & Not at all
意思表達係一樣.
只係你想點講.
例如: 'Thank you for your help!'
你答: {(對我而言,你是屬於無任歡迎).[You're welcome(to me)] to me 慣性唔講.}
{(對我而言,我都無幫你做過啲乜嘢).[(For me to you.) Not at all.] for me to you 慣 性唔講

You are welcome -樂意幫忙。歡迎你「要求幫忙」。
Not at all - 不用謝。別介懷。

'You are welcome'--人家多謝你時, 你的禮貌回答.

'Not at all'--人家覺得煩擾到你, 向你'唔好意思'時, 你的禮貌回答.