You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Linda Wilson. I have checked my reservation history and found that the existing reservation details are wrong, I want to modify those details. Will your agency help me in that?

ASSISTANT: Sure, please wait a moment. Sorry Linda, no reservation has been found on your name in our database.

USER: That's not at all problem for me. Thanks for informing me the available details.

ASSISTANT: Thank you for using our service.