Hi.
Hello, how may I aid you?
Owing an emergency want to change my reservation so, can you please help me out with this?
Sure, we are glad to help you. Can you please let me know your good name?
Sure, my name is George Nelson.
We are sorry to inform you that, there is no active reservation on your name in our data.
  That's fine, thank you for the response.
Thank you for contacting us.