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