You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to cancel my reservation due to an emergency, can you please cancel it?

ASSISTANT: Sure, can I have your name please?

USER: I am David Nelson.

ASSISTANT: There is no reservation found with your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Have a good day.