You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My plans to visit Charlotte got postponed, can you please help me in changing my existing reservation to Charlotte?

ASSISTANT: Sure, may I know your name?

USER: My previous reservation has done with the name Amanda Gonzalez.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, there is no flight on your name.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for choosing us.