You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you at present?

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

ASSISTANT: Sure, I can change your reservation right now. Before that I need to know your good name please?

USER: Nicole Phillips here.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: It's okay. Thank you.

ASSISTANT: Thank you for choosing us.