Facebook M, a text-based personal assistant launched in the beta form killed to be in August, 2015.
The human-enhanced version of M was provided by a chatbot on Facebook Messenger a couple of thousand people in California, but has been rolled out to more users.
The company confirmed that the service will not be extended, describing it as an “experiment”.
An analyst said that the service had failed to live up to the expectations.
A spokesperson from Facebook the Messenger service told the BBC that M shall be deleted, namely: “We started this project to learn what people needed and expected of an assistant, and we have learned a lot.
“We are in the process of this useful knowledge to power other AI (artificial intelligence) projects on Facebook.
“We continue to be very satisfied with the performance of M proposals in Messenger, powered by our learnings from this experiment.” Human Help
M, as has been described, a Siri-like personal assistant, which could be used to carry out functions such as booking restaurants and flights and send gifts.
He relied on human help – some suggest as much as 70% of the work.
Facebook is expected to continue to be aspects of the service by M suggestions, a service provide the recommendations to the user via the Messenger.
Ben Wood, analyst at CCS Insight, said: “Facebook is constantly experimenting in different areas, and it appears the M-service does not live up to expectations. On this basis, it makes sense to close for the company, the service.
“We believe, however, there are still very large investments going into the artificial intelligence at Facebook and other AI-powered services arise in the future.”