How to reply to the exclamation 怎样回复感叹

Don't make a fuss(about/over it). 别大惊小怪的。
It's nothing. 没什么了不起的。
It's just so-so. 很平常，很一般。
Really? 真的吗？
Thank you. 谢谢。
Yes,they's really beautiful. 是的，它们真的很漂亮。

I'm glad to hear it. 听你这么说我很高兴。
I'm glad you like it. 很高兴你喜欢它。
It's a storm in a tea cup. 小题大作；大惊小怪。

To be honest...  说实话…… 
Honestly... 实话说…… 
Is it true? 真的吗？
Is it really that good? 真那么好吗？
Is it just as what you said? 真像你说的那样吗？