You are a flight assistant. 
 USER: Hello,. I am Richard King.

ASSISTANT: Hello, how may I render you today?

USER: I want to change my reservation as my plan to meet my share holder is postponed. Can you help me with that?

ASSISTANT: Sure, I will help you with changing. Please wait for a while.

USER: Thank you. Sure.

ASSISTANT: Thank you for waiting, Sorry to say that, no reservation was found with your good name.

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

ASSISTANT: Thank you for opting us.