User controlled task execution with task persistence for assistant systems

1. A method comprising, by a client system:

receiving, at the client system, a first user request to suspend a first task being executed by an assistant system operating on the client system;

suspending the execution of the first task responsive to the first user request;

receiving, at the client system, a second user request;

determining, based on user interactions with the assistant system with respect to one or more entities associated with the first task, that the second user request is a request to resume the suspended first task; and

presenting, at the client system, a prompt to resume the first task.

2. The method of claim 1 , further comprising:

determining, by a natural-language understanding module, the first user request is associated with a meta-intent to suspend the first task.

3. The method of claim 1 , further comprising:

determining, based on a current dialog state and contextual information associated with the first user request, that the first task is associated with the first user request.

4. The method of claim 1 , further comprising:

determining, by a natural-language understanding module, the second user request is associated with a meta-intent to resume the first task.

5. The method of claim 1 , further comprising:

determining, based on a current dialog state and contextual information associated with the second user request, that the suspended first task is associated with the second user request.

6. The method of claim 1 , wherein the first task comprises one or more sub-tasks, wherein the method further comprises:

storing a dialog state for the first task in response to the first user request, wherein the dialog state comprises results of executed sub-tasks of the first task and a status indicating the first task is suspended.

7. The method of claim 6 , wherein storing the dialog state for the first task comprises:

allocating a particular portion of the dialog state to the first task, wherein the particular portion is associated with one or more of a task identifier or a task name associated with the first task.

8. The method of claim 7 , further comprising:

accessing the dialog state for the first task.

9. The method of claim 8 , wherein accessing the dialog state for the first task comprises:

identifying the particular portion of the dialog state based on one or more of the task identifier or the task name associated with the first task; and

retrieving the particular portion of the stored dialog state, wherein the retrieved portion comprises the dialog state for the first task.

10. The method of claim 8 , wherein accessing the dialog state for the first task is based on one or more task policies.

11. The method of claim 8 , wherein the prompt comprises a summary of the first task, wherein the summary is generated based on the accessed dialog state.

12. The method of claim 11 , wherein the summary is generated by a natural-language generation (NLG) module based on one or more of a language-template or a language model.

13. The method of claim 6 , wherein the dialog state for the first task is stored in a dialog state stack, wherein the storing of the dialog state in the dialog state stack is based on a priority associated with the first task.

14. The method of claim 6 , wherein storing the dialog state for the first task is based on one or more task policies.

15. The method of claim 1 , wherein the first or second user requests are based on one or more of a textual input, an image input, a video input, an audio input, or a gesture input.

16. The method of claim 1 , wherein the first user request is from a first user, wherein the method further comprises:

determining, based on one or more of contextual information associated with the first user or a policy associated with the first task, that the first user needs to be reminded of the suspended first task; and

presenting, at the client system, a notification reminding the first user of the suspended first task.

17. The method of claim 1 , further comprising:

receiving, at the client system, a third user request to execute a second task;

executing the second task; and

resuming the first task based on execution results of the second task.

18. The method of claim 1 , further comprising:

generating a task-function based on the suspension and resuming of the first task, wherein the task-function comprises one or more default intents and one or more slot-values for one or more slots associated with the first task, respectively, and wherein the task-function is associated with a task alias;

receiving, at the client system, a user call from a user, wherein the user call comprises the task alias;

presenting, at the client system, a summary of the task-function based on the default intents and the slot-values; and

executing the first task based on the default intents and the slot-values upon receiving a confirmation from the user.

19. One or more computer-readable non-transitory storage media embodying software that is operable when executed to:

receive, at a client system, a first user request to suspend a first task being executed by an assistant system operating on the client system;

suspend the execution of the first task responsive to the first user request;

receive, at the client system, a second user request;

determine, based on user interactions with the assistant system with respect to one or more entities associated with the first task, that the second user request is a request to resume the suspended first task; and

present, at the client system, a prompt to resume the first task.

20. A system comprising: one or more processors; and a non-transitory memory coupled to the processors comprising instructions executable by the processors, the processors operable when executing the instructions to:

receive, at a client system, a first user request to suspend a first task being executed by an assistant system operating on the client system;

suspend the execution of the first task responsive to the first user request;

receive, at the client system, a second user request;

determine, based on user interactions with the assistant system with respect to one or more entities associated with the first task, that the second user request is a request to resume the suspended first task; and

present, at the client system, a prompt to resume the first task.