You are a flight assistant. 
 USER: Hello. Carol Miller here.

ASSISTANT: Hello Miller, how may I help you today?

USER: Due to heavy traffic, I have missed my flight. Can you cancel my ticket?

ASSISTANT: Sure, please wait for a while, I will check your reservation status.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found with your name in our records.

USER: It's ok. Anyway, thank you.

ASSISTANT: You are welcome.