Hello.
Hello, how can I assist you?
Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?
Sure, I am here to help you. May I know your name please?
Thank you. I am Justin Hall.
Ok, please stand by.
Sure.
Thank you for waiting, sorry no reservation found on your name.
No problem, thank you for the information.
Thank you for reaching us, have  a good day.