Hello.
Hello, how may I assist you today?
I want to change my existing reservation, can you please help me with this?
Sure, we are here to help you. Can I have your name to proceed further?
I am Betty Wilson.
Ok, please wait a moment.
Sure.
 Thank you for your time, sorry no reservation found on your name.
Ok, no problem. Thank you for your information.
Thank you for reaching us.