Will you are so kind as to let us know the quantity you can offer?
请您将可供数量告诉我们好吗？
Oh, you are so kind!
噢，你是如此的仁慈。
Oh, you are so kind.
噢，你真是好心人。
You are so kind and friendly.
你们真的很友善。
In my heart, you are so kind and optimistic that you always give me courage and energy.
在我心里，你是如此的善良和乐观，你总给予我勇气和能量。