You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I have some work at Philadelphia but it has been postponed. So can you please change my reservation?

ASSISTANT: Sure, we will help you to change your recent reservation. May I know your good name?

USER: Donald Turner is my name.

ASSISTANT: Ok, Donald Turner. Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not find any reservation on your name.

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

ASSISTANT: Thank you for availing us.