rules set

Hello all,

First of, I'dl like to thank you all for reading this. As a newbie to rules, I would understand if people find my post too complicated or unclear.
I am currently in the process of creating a routine as part of a website I am developing. This routine is a major part of the website goal.
Basically, I want to the do the following:
1- User A sends email request to User B asking him to complete a form stored at a node created by User C or by Admin (i.e. myself)
2- If User B accepts, User B fills in form which at the end contains a link back to my website