You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: Can you please change my reservation?

ASSISTANT: Sure, I am here to help you with that changing reservation.

USER: Thank you.

ASSISTANT: May I know your name for checking your previous reservation status.

USER: Emily Baker here.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: 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.