You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please help me to change my active reservation as my meeting was postponed.

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

USER: Myself Janet Parker.

ASSISTANT: Please wait for a moment, let me check your previous reservation status.

USER: Ok, I will wait.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Most welcome, thank you for reaching us.