Question

You answer the phone and the call is for your mother. (Ask the caller to wait in an informal way)

Answer 1

Answer:

Hi, my mother is not available at the moment, she will call you back in a moment. Thank you for your waiting.

Explanation:

When having to say something like this, you need to act focus and know what your saying in a slow undertsanding voice so the person understands what your trying to say.