You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Owing to an emergency I had to request you to cancel my reservation, can you help me with that?

ASSISTANT: Ok, please provide me your name.

USER: Sure, I am John Campbell.

ASSISTANT: There is no reservation found with your name.

USER: No problem, thank you.

ASSISTANT: Have a good day.