Making tasks pending / moving to drafts folder

[_Nith_]

For e.g a task is being assigned to a User.

The user doesn't want to complete the task as it might take sometime to complete it.

In this case, the user should be able to hold the task for a certain duration.

I placed a status drop-down in my form which contains several statuses including "Pending".

However, as per my current design:

If the user selects "pending" status, and click submit button, the form is again sent to the same user's worklist as a new task item.

Is it possible to move the form to Drafts folder?? or to prevent submit on "pending" status??

Thanks,

Nith