"we will endeavour to ensure" is correct and usable in written English. You can use it when you want to express a commitment to bringing about a desired result. For example: "We will endeavour to ensure that our customers receive the best shopping experience possible.".
I will endeavour to ensure, as far as I can, that the decision he reaches in due course is a fully informed one".
Microsoft has no hard-and-fast rule for how long it will endeavour to ensure compatibility between its current systems and legacy software.
We will endeavour to answer as many questions as possible but can not guarantee that we will be able to get to all of them.
In time we will endeavour to answer those we can.
This year we will endeavour to build on our existing success.
We will endeavour to make a world that you are proud of.
We will endeavour to discuss a complaint with you at relevant times.
Thanks to Ludwig my first paper got accepted! The editor wrote me that my manuscript was well-written
Listya Utami K.
PhD Student in Biology, Bandung Institute of Technology, Indonesia