Hello.
Hello. How can I aid you?
I want to change an existing reservation, so please help me in changing the reservation.
Sure, We are here to help you. May I know your name?
Myself William Clark.
Give me a minute.
Ok.
 Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to change it.
Not an issue. Thank you.
Thank you for reaching us.