What do I do at my desk?

Hint 1 of 5:

You need to make a few phone calls.

Hint 2 of 5:

But you don't have the numbers

Hint 3 of 5:

So dial 411.

Hint 4 of 5:

Ask for Lytton and Marie Wilkans.

Hint 5 of 5:

Dial 555-4169.