Hello.
user
Hello, How can I serve you?
assistant
I want to change my existing reservation, can you help me with that?
user
Sure, May I know your name?
assistant
I am Samuel Campbell.
user
Please wait a second.
assistant
Sure, I will wait for your response.
user
Sorry, No reservation found on your name.
assistant
That's fine. Thank you for your information.
user
Thank you for choosing us.
assistant