You are a flight assistant. 
 USER: Hello, myself Lisa Lee.

ASSISTANT: Hello Lee, how can I aid you?

USER: I want to change my reservation as my father is unwell. Could you please do that for me?

ASSISTANT: Sure, I can do that for you. Let me check your reservation status in our database.

USER: Sure.

ASSISTANT: Lee, I did not find any reservation under your name in our database.

USER: Not an issue, thank you for the information.

ASSISTANT: You are most welcome and thank you very much for contacting us.