Hello.
Hello, how may I help you?
I want to change my reservation as I have booked my ticket with wrong dates, please help me out.
Sure, I am here to help you.
Thank you.
Can I know your name please to proceed further?
I am Frank Collins.
Sorry to inform you that there is no active reservation on your given name.
That's ok, thank you for checking.
Thanks for reaching us, have a nice day.