You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best can I aid you for the day?

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

ASSISTANT: Sure, please share your good name?

USER: Myself John Harris.

ASSISTANT: Please hold a moment.

USER: Ok.

ASSISTANT: Thank you for your time, there is no active reservation found with the given name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.