You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

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

USER: Thank you. Nicole Jones here.

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

USER: Thank you for the help.

ASSISTANT: Thank you for contacting us.