You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Katherine Young here. I would like to change my recent reservation because my friend marriage was postponed.

ASSISTANT: Sure, I am here to help you. Please hold on.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting, there is  no active reservation found on your name.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.