VMS Help REQUEST, Qualifiers, /REPLY  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Requests a reply to the message and issues a unique
    identification number to which the operator sends the response.
    The system displays a message that the operator has been
    notified; you cannot enter any commands until the operator
    responds. If you press Ctrl/C before the operator responds, you
    can then enter another message to the operator, or press Ctrl/Z
    to cancel the request.