You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, I am here to help you for this. May I know your name please?

USER: Katherine Scott here.

ASSISTANT: Just a moment, let me check your reservation status in our database.

USER: Ok.

ASSISTANT: Sorry for inconvenience, no reservation is found with your criteria.

USER: Not a big deal.

ASSISTANT: Thank you very much for contacting our agency.

USER: Thank you.

ASSISTANT: You are welcome.