Hello.
Hello. How can I aid you?
I am  Paul Gonzalez here. I want to change my previous travelling dates. Can you please help me out in changing my existing reservation?
Sure, I am here to help you in amending your reservation.
Thank you for considering my request.
Please allow me a moment to check for your status.
Sure, take your own time.
Thank you for waiting.
Ok.
Sorry, there are no is active reservation have been found under your name in our database to amend it.
Not a big problem, anyway thank you for the information.
Thank you for reaching us.