You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Katherine Nelson.

ASSISTANT: Katherine Nelson, hello may I assist you today?

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

ASSISTANT: I will help you. Please allow me a moment your time.

USER: Sure.

ASSISTANT: Katherine Nelson, I regret to inform you that there is no booking done on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us. Have a great day.