You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Anthony Mitchell. I need to cancel my reservation due to my planned event got postponed so please help me with that.

ASSISTANT: Sure, please wait for a moment to check your reservation details.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us, have a nice day.