Hello. I am Larry Green.
Hello, how can I guide you at present?
Due to some health issue, I want to change my existing reservation. Can you please help me with this?
I am willing to help you for this. Let me check your reservation status in our database.
Ok.
Thank you for waiting, I have checked in reservation list to change your ticket but could not find any reservation with your name.
Ok, Thank you for providing information.
Thank you for choosing us.