Hhi.
user
Hello, how may I guide you?
assistant
I am Raymond Allen. I would like to  cancel my existing flight ticket.
user
Sure, please hold on for a moment.
assistant
Sure, please take your time.
user
I am sorry, there are no reseravtions available.
assistant
Ok, no problem. Thank you for the information.
user
Thank you, have a good day. Thank you.
assistant