If you are going to be able to use the right level of formality you need to be able to recognise what is more formal. Obviously this has a lot to do with the sort of context which you do not have here, this makes this exercise quite difficult. Here you have to judge for the words and the intonation. To hear the sentence (they are all asking for somebody's name) click where it says "Click Here". Then drag the sentence to the right number (most formal or polite in a business situation first) on the left. You can change them around as you like before checking your answers with the "Check" button.