Hello.
Hello, how may I aid you?
I am Margaret Wright, I booked a ticket to Charlotte, due to some urgent work I have to replan my journey,  can you change my reservation?
Sure, I will do it for you. Please stand by I will get back to you.
Sure.
Thanks for your time, sorry to say no flights found with your details.
Ok, thanks for the information.
Thank you for availing us, have a nice day.