You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Amy Martin, I want to change my reservation as my plan to attend meeting at Detroit is postponed.

ASSISTANT: Ok.

USER: Can you help me with that?

ASSISTANT: Sure, I will help you. Please, standby.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for availing us.