You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Owing to an emergency I had to request for this cancel reservation.

ASSISTANT: Sure, I am here to help you out. May I know your name please?

USER: My name is Lisa Parker.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Lisa Parker, we haven't found any reservation under your name in our database. Thank you for choosing us.