Hi.
Hello. How can I aid you today?
Due to my health upset, I changed my schedule to next week. So, please change my existing reservation.
Sure, I will help you, may I know your name?
Anna Allen is my name.
Sorry, no reservation done previously on your name.
Ok, may be I have done with some other airline. Anyhow thanks for the information.
Thank you for approaching us, have a nice day.