You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Can you help me to change my recent reservation?

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

USER: My name is Alexander White.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. There is no active reservation found on your name in our database to change.

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

ASSISTANT: Thank you for reaching us, have a great day.