You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I have some personal matters that need fixing so I need to change an existing reservation. Can you please help me in that?

ASSISTANT: Sure. May I know your good name to check the previous reservation?

USER: My name is Alexander Anderson.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: That's not a problem. Thanks for your information.