You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Jessica Wilson. I want to change my earlier reservation which was reserved to New York. Can you modify my source code?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, thank you.

ASSISTANT: Thank you for opting us.