You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I need to change my recent reservation as my plan to visit DEN got changed. Now I am going to JFK instead. Can you help me in changing?

ASSISTANT: Sure, may I know your good name?

USER: I am Laura King.

ASSISTANT: Please wait for a moment, while I check for the reservation on your name.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: Ok fine. Thanks for your response.

ASSISTANT: Thank you for visiting us, we hope see you again.