You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Betty Green here.

ASSISTANT: Welcome to flight booking agency Green.

USER: I was made a wrong reservation earlier in this week. Can you please help me for change my reservation?

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: Please wait a moment to check your previous reservation status.

USER: Ok, take your time.

ASSISTANT: Sorry to inform you that, there is no reservation found with your name in our records.

USER: Thank you for the information.

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