Once you’ve received an input from the user and saved it as an attribute. You can skip the attribute if the same input is going to be asked again in your other flows. There two ways in which you can skip the input.
Skip with no confirmation - Here the bot with skip the process without confirming the details
Skip with confirmation - The bot will ask the user a question to confirm if the attribute is correct
Under advance, you will have to set an error message if the user’s reply is not as per the given requirement.