You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Sure, I will help you in cancelling your reservation. May I know your name please?

USER: Myself Nicholas Collins.

ASSISTANT: Collins, I have not found any reservation by your name in our database.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us and have a nice day.