Hi.
user
Hello, how can I assist you today?
assistant
I want to change an existing reservation due to sudden change in trip. Can you help me?
user
Sure, please wait for a moment.
assistant
Ok.
user
May I know your good name?
assistant
I am Thomas Miller.
user
Sorry to say that, no reservation was found with your good name.
assistant
OK. Thank you.
user
Thank you for opting us.
assistant