Hello.
user
Hello, how may I help you?
assistant
My name is John Young. I want to do some changes in my existing reservation, can you help me for that?
user
Yes, please I will help you with the change of flight ticket booking. Please wait for a moment.
assistant
Thank you. Sure, I will wait for your response.
user
Thanks for waiting. But I am sorry to say that there is no flight reservation on your name to change it.
assistant
That's ok, thank you for checking.
user
Thank you.
assistant
Welcome.
user