You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you aid me to change my reservation due to an emergency?

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

USER: Thank you. Steven Hill here.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: No issue. Thank you.

ASSISTANT: Thanks for reaching us, have a nice day.