You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure. May I know your name to check with the current status?

USER: My name is Amy Lopez.

ASSISTANT: Thank you but there is no reservation found on your name.

USER: Not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your valuable information.