Hello.
Hello,  How can I support you today?
I am Michael Baker. As my destination is changed, I want to change my existing reservation. Can you help me in changing reservation?
Sure, I will help you with that.
Ok.
Please wait for a while, to check the present status of your earlier reservation and let you know.
Sure.
Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.
Ok, No problem.
Thank you for choosing us, Have a blissful day!.