Hello.
user
Hello. How may I aid you?
assistant
I am Robert Wilson. Can you please help me in changing my existing reservation?
user
Sure, I will help you with the change of flight reservation.
assistant
Thank you.
user
Wait for a moment please.
assistant
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
Ok, not an issue. Thank you for providing information.
user
Thank you.
assistant