A apparatus for sharing booking information may provide a user interface (UI) for sharing booking information, receive an input of booking information corresponding to at least one of items specifying an entirety of booking information through the UI, receive a sharing request for sharing at least one portion of the entirety of booking information through the UI, identify at least one item corresponding to booking information input until a current point in time among the items in response to the sharing request, generate a booking information sharing message including first booking information corresponding to the identified at least one item and enabling an input of second booking information corresponding to at least one other item among the items which is distinguishable from the identified at least one item, and transmit the booking information sharing message to at least one receiver terminal through a messenger.