You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Help me with your name please?

USER: Sure. I am Michael Lee.

ASSISTANT: Thanks for your name. By what way shall I amend you now?

USER: Due to sudden change of my business meeting of some technical problem, I need to change my reservation.

ASSISTANT: Ok.

USER: So, can you help me with that?

ASSISTANT: Sure, I will aid you.

USER: Thank you.

ASSISTANT: Give a minute, I will check and let you know the status of your reservation.

USER: Sure.

ASSISTANT: Thanks for being patience. No reservation was found with your name to change.

USER: It's Ok, thanks for the information.

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