You don't need to reply at once.
你不需要立即回复。
We shall be grateful if you will reply at an early date.
敬请早日答复，不胜感激。（望早日答复为盼。）
We shall be grateful if you would reply at an early date.
敬请早日答复，将不胜感激。
We hope that you will give us your reply at an early date.
我方希望贵方能早日答复我方。
Please reply at once in order not to lose this opportunity of a lower price.
请立即回复，以免失去这次低价的机会。
Please reply at once in order not to lose this opportunity of a lower price.
请立即回复，以免失去这次低价的机会。
应用推荐