You are a flight assistant. 
 USER: Hello. I am Carolyn Lopez.

ASSISTANT: Hello, By what way, can I help you out?

USER: Owing for an emergency, I want to change my flight reservation. Can you please help me?

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

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

USER: That's fine. Anyway, thank you for checking.

ASSISTANT: Thanks for consulting us, have a nice day.