Useful language
Taking a call
(Name) speaking.
How can / may I help you?
Asking to wait
Hould the line, please.
Just a moment, please.
Asking for personal details
Can I have your name?
Can I have your address?
Asking for information
What seems to be the problem?
Complaning
I'm afraid it dosn't work properly.
I guess the product is fautly.
I'd like to change / return the item.
I'd like to have a refund.
Apologizing
I'm sorry to hear that.
Sorry, but that's our return policy.
Thank you for being so patient.