UiPath_REFramework suitable for an office project?

Hi Guys,
I am planning to work in an accounting firm project where clients list has be to processed by reading it from the booking emails. There can be new or existing clients. For new clients there is an additional procedure for registration and rest of processes are the same for both.
So, at this stage, I am not sure whether to go with a flowchart or sequence. Also need a suggestion on how good is Uipath_REFramework to be used for this project. Thanks