You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Katherine Campbell. I want to change my reservation because my leaves are not been approved. Can you help me with that?

ASSISTANT: Sure, I will help you out.

USER: Thank you.

ASSISTANT: Please wait a moment, let me check the details on your name.

USER: Sure, take your own time.

ASSISTANT: Sorry Campbell, no reservation found on your name. Sorry for the inconvenience.

USER: That's ok, thank you for assisting me.

ASSISTANT: Thank you for reaching us.