You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I render you today?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, we are here to help you. May I know on which name the ticket has been reserved?

USER: Thank you. The ticket has been reserved with the name of Amanda Walker.

ASSISTANT: Ok, please wait for a while, let me check the reservation status and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: We are sorry to notify that, we did not find any reservation on your name.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for choosing us. Have a good day.