Hello.
Hello, how may I aid you?
I am planning to change an existing reservation, due to health issue. Can you please help me out?
Sure, we are here to help you.
Thank you.
On whose name, the reservation has been made earlier?
My name is Jacob Green.
Please wait for a while.
Sure.
Thanks for your time, there is no active reservation found in your name.
That's  fine, thank you for your service.
Thank you for choosing us.