What are the responsibilities of a liaison?

user liaison handles the need of user n user system relationship

A liaison officer is responsible for ensuring communication and cooperation between two or more entities by serving as an official go-between between top-ranking officials of each organization....

Everyone has their right and wrong responsibilities, that's what makes us humans.

According to the Princeton web dictionary: duty: the social force that binds you to the courses of action demanded by that force; "we must instill a sense of duty in our children"; "every ......

Responsibility lies (with Mary, for example). The word "lay" is used to indicate responsibility as well : "He wants to lay the blame on me."