You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

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

ASSISTANT: Sure, may I know your name to check with the previous reservation?

USER: Myself Christine Turner.

ASSISTANT: Please wait a moment, let me check.

USER: Ok.

ASSISTANT: Sorry, there are no active reservations on your given name to change.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching our service.

USER: Thank you.