You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please change my active reservation as my meeting was changed.

ASSISTANT: Sure, can you provide me your name please?

USER: Lisa Parker.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Lisa Parker. I regret to inform that there is no reservation by your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.