However, depending on the context, you might consider these options:
* Courtesy: This refers to polite behaviour, which "please" often signifies.
* Politeness: This is a broader term encompassing a range of polite actions and attitudes.
* Request: This directly refers to the act of asking for something, which "please" often accompanies.
* Favor: This can be used when "please" is used to ask for something specific or to express a desire for someone to do something for you.
Ultimately, the best "abstract noun" for "please" will depend on the specific context and the desired meaning.