Hello.
Hello, how may I help you?
I would like to change my existing reservation, please help me out.
Sure, I will help you with the change of flight reservation. May I know your name please?
Sure, my name is Samantha Davis.
Thanks for waiting patiently. But I regret to inform you that that there is no flight reservation on your name to change it.
Ok, no problem. Thank you for your information.
Thank you.