You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I help you?

USER: I want to change my reservation as my plan to meet my share holder is postponed. Can you help me in changing my reservation with name Amanda Miller?

ASSISTANT: Sure, I will help you. May I know your good name?

USER: As I have already mentioned above, please check the details.

ASSISTANT: Sorry for the inconvenience, There is no reservation found with your name.

USER: Ok, not a problem. Thanks for the information.

ASSISTANT: Thank you for choosing us.