In Facebook`s first foray into the transportation business, the firm has agreed to work with Uber to allow users to hail Uber cabs directly from the Messenger app.The new service means Messenger users will be able to ask for an Uber vehicle without leaving the Facebook software.Users will not need to download the Uber app separately."Uber on Messenger" began in parts of the US this week, the two firms said.The companies announced their new venture via separate blogs.Facebook has some 1.5 billion users globally and Uber is the world`s biggest driver-hailing app in terms of financing. -BBC