You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you today?

USER: My name is Michael Moore, I want to change my reservation as my meeting with share holders is postponed. Can you change my reservation?

ASSISTANT: Sure, please wait for few minutes.

USER: Sure.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for approaching us.