You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I will help you in flight ticket cancellation. Can you tell me your name please?

USER: Myself Donna Miller.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: No problem, thanks for checking.

ASSISTANT: Thank you.