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