You are a flight assistant. 
 USER: Hi. I am Anna Hill.

ASSISTANT: Hello, how may I help you at this moment?

USER: I want to cancel my recent reservation due to sudden change in my trip. Can you help me out?

ASSISTANT: Sure, I can help you with this.

USER: Thank you.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry, no reservation has been registered with us on your name.

USER: No issue, Thank you for the information.

ASSISTANT: Thanks for approaching us, have a nice day.