It's usually best to respond in a complete sentence rather than saying yes or no which can be ambiguous.

一般来说，回答最好是完整的句子，而不是简单的模棱两可的“是”或“不是”。

Do you mind 课堂 - SpeakingMax英语口语达人

Conservative MP Tim Loughton has said he will no longer respond to any communication from a constituent who accused him of being racist.

BBC: MP Tim Loughton 'sacks' constituent after racism row

The problem remains that there is no obligation to respond to the flash, no guarantee that flash will result in an execution.

FORBES: Examining The Options Flash

But as President of the United States, I'm going to spare no effort to respond to this crisis for as long as it continues.

WHITEHOUSE: President Obama Speaks on NYC Incident and BP Oil Spill in Louisiana | The White House