You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to change my existing reservation because of my health issues, can you please help me out?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: May I know your name so that I can help you easily.

USER: Sure, my name is Eric Edwards.

ASSISTANT: Please wait a moment, let me check the status of your reservation.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found with your name on our database.

USER: Ok, no problem.

ASSISTANT: Ok, thanks for consulting us.

USER: Thank you for your information.