You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you at this moment?

USER: I am Stephanie Carter want to change my existing reservation, can you please help me with this?

ASSISTANT: Sure, May I know your good name please for further process? Ok, Please wait for some time. I will check with your existing reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, There is no reservation found on your name.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for approaching us, have a good day.