Hi.
user
Hello. How may I help you?
assistant
Can you please help me in changing my existing reservation?
user
Sure. Tell me your name please?
assistant
Ronald Williams.
user
Please wait.
assistant
Sure.
user
Thanks for waiting. But I am sorry to say that there is no flight reservation on your name to change it.
assistant
Ok, no problem. Thank you.
user
Thank you.
assistant