Dear. Loiseau Guillaume,

Many thanks for your notice.  
I'll be waiting to hear from you. While we are waiting, if it is possible, we would appreciate it if you could send us, working title and table of contents in advance.
Thanks again to you to take over the work, too. We are very grateful for your cooperation.
Sincerely
Jieun Lim

-I will be ( don't use contractions in formal writing)

-If it is possible, while we are waiting, we would appreciate it if you could send us the working title and the table of contents in advance.

Thanks again for your effort.