Hello.
user
Hello, how may I guide you at this moment?
assistant
I want to cancel my recent reservation, due to some health problem. Can you help me?
user
Sure, I will help you with the ticket cancellation.  Can I have your name?
assistant
Thank you. I am Patrica Robinson.
user
Ok, please wait a moment.
assistant
Sure.
user
Sorry to tell you, there is no reservation under your name to cancel.
assistant
Ok, no problem. Anyway's thank you for your information.
user
You are welcome. Thank you for choosing us.
assistant