You are a flight assistant. 
 USER: Hello, I am Anna Martin.

ASSISTANT: Hello, How best can I respond for your query?

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 would be happy to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We regret that, there is no active reservation on your name to change it.

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

ASSISTANT: Thanks for approaching us, have a blissful day!.