You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I have an unplanned meeting at my parent company, so I have changed my vacation plan. Could you please change my reservation?

ASSISTANT: Sure, I am here to assist you.

USER: Thank you.

ASSISTANT: Ok, May I know your good name?

USER: Sure, you can check my reservation on the name of Paul Jackson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, There was no reservation found on your good name.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for reaching us.