Hello, I'm Timothy Williams.
Hello Williams. How can I aid you?
Due to the sudden change in the climatic conditions in the place where I want to go, I would like to change my existing reservation.
That's bad to hear. I will help you, give me a minute.
Ok sure, take your time.
Sorry Williams, I couldn't find any reservation on your name.
That's ok, may be my friend has been changed it before. Anyways, thank you.
You are welcome.