You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, may I know your name?

USER: Thank you for taking my request, I have reserved it on the name of John Mitchell.

ASSISTANT: Wait a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: Oh! I think it might be cancelled by my cousin. Anyway, thank you for the information.

ASSISTANT: Thank you for choosing us.