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