You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I benefit you?

USER: I need to change my existing reservation, Can you please help me with that?

ASSISTANT: Sure, let me check the status and revert you. May I know your name to check?

USER: My name is James Young.

ASSISTANT: We could not find any reservation by this name.

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

ASSISTANT: Thank you for approaching us.