Use automation to choose a file from dialog box?

Hello experts.
I am using XML automation and I want to load XML file but without placing specified path in AutomationVariable.load( ).
Instead I want to open dialog box and choose source file as well as dialog box for saving XML file with specific name I wish to enter.
Is this possible just like when we use ExcelBuffer.OpenBook?
Another alternative would be to choose all XML files from specific folder for which I would place path in AutomationVariable.load('C:\path').
Can this be done?

THANKS!