Hello Shabir,
You have many options to find the report in AOT:
1) In Report Dialog-> Right Click -> Setup ->Information page, here you will get the report name in Caller Edit box, you can also click Edit to go directly to AOT
2) In AOT -> Menus , find the report menu item name and from it you find the report in AOT
3) Make code modifications to the report classes to always display report name on the title, for this you need to modify method createReportViewer() in ClassFactory class ,be carefull tought because ClassFactory is a system class which is loaded every time AX is started so it should be modified with care.
4) Set a breakpoint at parmReportName method of SrsReportDataContract class, debug and you will get to your report name
5) You could also run an sql query on the report database(default name is ReportServer) to select the last executed reports:
SELECT TOP 100 * FROM [ReportServer].[dbo].[ExecutionLog2] ORDER BY TimeStart DESC
Once you find the report name you can use the find tool to locate it in AOT
Best regards