商务英语函电中表达感激的经典句型：

1.We assure you of our best services at all times.

我方确保向贵方随时提供服务。

2.We spare no efforts in endeavoring to be of service to you.

我方将不遗余力为贵方效劳。

3.We should be grateful for your furnishing us details of your requirements.

如承赐示具体要求，不胜感激。

4.Please accept our thanks for the trouble you have taken.

有劳贵方，不胜感激。

5.Allow us to thank you for the kindness extended to us.

对贵方之盛情，不胜感谢。

6.We solicit a continuance of your confidence and support.

恳请贵方继续给予信任，大力支持。