You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Pamela White, I want to change my reservation , can you help me with that?

ASSISTANT: Sure, let me know your name to check the reservation list? Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to change the reservation.

USER: Ok.

ASSISTANT: Thanks for availing us.

USER: Thanks for the information.