You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you at this moment?

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

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

USER: I am Sarah Edwards.

ASSISTANT: Sorry, we could not find any reservation with your name.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for availing us.