You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

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

ASSISTANT: Sure, I will help you with that. May I know your good name?

USER: Sure, my name is Linda Thomas.

ASSISTANT: Ok, wait a while.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, we did not find any reservation with your name.

USER: That's not a problem. Thanks for your quick response.

ASSISTANT: Thank you for reaching us, Have a great day.