In my line of work, I've encountered many customers, and it's safe to say that most of them are the stupid type. I'm not sure whether they are getting the correct education or they simply does not gasp the simple concept, is beyond my comprehension. I'm too tired to think of a way to help them any longer. Here's one good look at the example.

Me: "Hello, thank you for calling Technical Support"
Customer: "Hello?"
Me: "Hi, how can I help you?"
Customer: "Hello?"
Me: "Yes?"
Custemer: "Hello?"

I'm not sure whether customer is hearing me or not, so I will try the question-the-question tactic.

Me: "Hello?"
Customer: "Yes, hello?"
Me: "How can I help you?"
Customer: "Hello?"

Now, it's a little odd, he hears me and yet, Hello is his only reply. I'm going to test more of his grammar and speech capability.

Me: "Are you in need of help?"

He's going to say Hello.

Customer: "Hello?"

I'm surprised at such people.

Me: "Do you want me to help you?"
Customer: "Oh, yes, yes. Hello?"

There he goes again, just when I'm getting so close. Back to the question-the-question tactic.

Me: "Hello?"
Customer: "Yes, hello?"