In SharePoint Online Infopath Form : User Profile Issue

@rajkiran, thanks for the solution. But in this solution, it is told to use User Infomation List (hidden) as the workaround of userprofile service. That's solution is fine for some level. But recently i faced issue as i need to retrive the current user's manager and his manager (2nd level manager). In this case the  User Infomation List list will not surve the business. So can you please suggest any other wayaround?

@Manpreet, Thanks for your replay. But no, there is no option right now. Busness owner is suggesting to maintain the business with-in infopath.