You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you now?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, I  will help you in changing.

USER: Thank you.

ASSISTANT: Please, share me your good name to check your reservation status.

USER: I am Justin Collins.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that, we have not found any active reservation on your name.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thanks for opting us, have a good day.