A: Hello, ABC Company. May I help you? B: Hello. Yes. This is Abercrombie Fitch. May I speak to Helen O'Brian please? A: This is she. What can I do for you? B: Oh— hi, Helen. This is Abe. Are you free for lunch today? etc.
Sorry, can I ask during the call, if I am trying to recognize a voise: Is that you? / Is this you? Is this Mr. D.? Or it will be rude. Or may be: Are you there? Thanks