Hello.
Hello, how best  I can assist you at this moment?
I am planning to change an existing reservation, due to health issue. Can you please change my reservation?
Sure, we are here to help you. May I know your name please?
My name is Rebecca Phillips.
Ok, please be on hold for some time.
Sure, I will wait for your reply.
Thank you for your patience, sorry we couldn't find any reservation on your name.
That's fine, thank you for your service.
Thank you for choosing us.