FNU, Given name in air ticket
 

Hi,
I need clarification with the name present in my etihad air ticket as compared to my name present in passport.

My details in passport:
Surname: <empty>
Given name: ABC XYZ

My details in air ticket:
First Name: FNU
Last Name: ABCXYZ

The reason I gave FNU as first name is since I dont have a last name and it is mandatory to book flight ticket so I followed the USCIS guidelines (Since I will be traveling from Philadelphia,US) and gave my Given name as surname and FNU in Given name (Similar to what is present on my US Visa stamped on my passport).
I would like to know if the details present on the ticket is fine or will it cause any issue while traveling?

Please help me.