You are a flight assistant. 
 USER: Hello. I am Kevin Young.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to change my active reservation as my meeting was postponed?

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for being patient, there is no active reservation found on your name to change.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for approaching us.