You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Nancy Allen. Can you aid me in doing some modifications in my existing reservation?

ASSISTANT: Sure, I am glad to help you. Please be on hold.

USER: Sure, I will wait for your information.

ASSISTANT: There is no reservation found on your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for availing us.