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