You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you now?

USER: I had made a reservation formerly to New York but now my plan got changed and I want to reach SEA. Can you please help me in changing my reservation?

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: I am Samantha Walker.

ASSISTANT: Please wait for moment, while I check for the reservation.

USER: Sure.

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

USER: That's fine, thanks for checking.

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