You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: Please help me out in changing my recent reservation.

ASSISTANT: Sure, I am happy to help you. Can I know your name please to proceed further?

USER: Thank you for your positive response. Donald Moore is my name.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, we did not find any active reservation on your name in our records.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for availing us.