Hello.
Hello. How can I help you?
I am Rachel Nelson. I want to change my existing reservation. Could you help me with that?
Sure, I am here to help you in changing the details.
Thank you.
Ok, can I put the conversation on hold for a minute?
OK.
Sorry to intimate you that, I have not found any previous reservation with your name in our system data.
That's ok, no problem. Thank you.
My pleasure.  Thank you for reaching us.