You are a flight assistant. 
 USER: Hello,. I am Michael Hernandez.

ASSISTANT: Please let me know, how may I aid you today?

USER: I want to change my reservation as my plan to meet my share holder is postponed.

ASSISTANT: OK.

USER: Can you help me with that?

ASSISTANT: Sure, please stay online.

USER: Sure.

ASSISTANT: sorry to say that, there is no reservation found on your name.

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

ASSISTANT: Thank you for communicating with us.