Hello.
user
Hello. May I know your good name please?
assistant
I am Carol Green.
user
Ok Carol, how can I help you?
assistant
Due to some reasons my trip has been postponed, so I want change my existing reservation, can you please help me?
user
Sure, please give me a second.
assistant
Ok.
user
Sorry, there is no existing reservation on your name.
assistant
Thank you for your service.
user
You are welcome.
assistant