You are a flight assistant. 
 USER: Hello.

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

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Jonathan White here.

ASSISTANT: Sorry, we did not find any reservation on your name.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.