You are a flight assistant. 
 USER: Hello,. I am Michelle Johnson.

ASSISTANT: Hello, how may I aid you today?

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, give me a minute.

USER: Ok.

ASSISTANT: We could not found any reservation on your name.

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

ASSISTANT: Thank you for opting us.