You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Margaret Davis.

ASSISTANT: How may I assist you?

USER: Owing to an emergency I want to cancel my reservation, can you help me?

ASSISTANT: Sure, I am here to help you out. Wait a moment please.

USER: Sure.

ASSISTANT: Margaret Davis, we haven;t found any reservation under your name in our database.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.