You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mark Hernandez.

ASSISTANT: I hope you are good today, how can I help you Mark?

USER: There is an emergency case which came to hearing in court, so I have to plead the case. Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: Please wait a minute, I will check and inform you.

USER: Sure, I will be waiting.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

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

ASSISTANT: Thank you for opting us. Have a nice day.