You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Since my meeting got postpone, I want to cancel my reservation. Can you help me with cancel reservation?

ASSISTANT: Ok, let me know your name please?

USER: I am Donna Campbell.

ASSISTANT: Donna Campbell, there is no reservation found on your name.

USER: It's ok.

ASSISTANT: Thank you for choosing us.

USER: Thanks for everything.