You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, please provide your good name?

USER: My name is Michelle Martin.

ASSISTANT: No reservation matches with your name in our database.

USER: That's not a problem. Thank you.

ASSISTANT: Thank you for approaching us.