Hello.
Hello, how can I help you?
I want to change an existing reservation, can you please help me?
Sure, I can do that for you. Please wait, let me check your reservation status first. For checking, may I know your name?
Sure, I am Rachel Walker.
Sorry Walker, I have not found any reservation by your name in our database.
No problem. Thank you for your information.
You are most welcome and thank you for choosing us.