19. A system, comprising: one or more processors; and memory storing instructions, the instructions, when executed by the one or more processors, cause the one or more processors to perform operations comprising: receiving a user request through a conversation interface of the intelligent automated assistant, the user request comprising at least a speech input received from a user; identifying a respective candidate domain relevant to the user request from a plurality of predefined domains, wherein each predefined domain presents a respective area of service offered by the intelligent automated assistant, and wherein the respective candidate domain provides a reservation service to the user; making a reservation in accordance with at least the user request; and proactively offering an option to share information regarding the reservation with a selected group of one or more other users.
19. A system, comprising: one or more processors; and memory storing instructions, the instructions, when executed by the one or more processors, cause the one or more processors to perform operations comprising: receiving a user request through a conversation interface of the intelligent automated assistant, the user request comprising at least a speech input received from a user; identifying a respective candidate domain relevant to the user request from a plurality of predefined domains, wherein each predefined domain presents a respective area of service offered by the intelligent automated assistant, and wherein the respective candidate domain provides a reservation service to the user; making a reservation in accordance with at least the user request; and proactively offering an option to share information regarding the reservation with a selected group of one or more other users. 26. The system of claim 19 , wherein sending the invitation for the reservation to the selected group of one or more other users further comprises sending the invitation with directions to the selected group of one or more other users.