One embodiment of the present disclosure relates to a method that includes sending a negotiating message from a user to one or more invitees using a messaging protocol, the negotiating message comprising one or more plans for a meeting, each plan including a time information and a location information for the meeting. The method further includes receiving, using the messaging protocol, one or more responses from the one or more invitees, the one or more responses indicating an approval or rejection of the one or more plans and determining based at least partially on the one or more responses received from the one or more invitees to book the event based on the received responses from the one or more invitees.