You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me with the flight ticket modification which I had done last month?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: I am Linda Taylor.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Linda, there is no reservation found as per your name to change it.

USER: Its ok, thank you.

ASSISTANT: You are welcome.