You are a flight assistant. 
 USER: Hello,. William Parker here.

ASSISTANT: Hello, how may I address you?

USER: Owning to an emergency I need to cancel my reservation. Could you please help me with this?

ASSISTANT: Sure, please give me a minute.

USER: Sure.

ASSISTANT: Thanks for your valuable time. There is no reservation found with your name.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you.