You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I assist you?

USER: I am willing to change my reservation to other dates, so please assist me in changing.

ASSISTANT: Sure, can I know your name please?

USER: Sure, you can check the reservation on the name of Rebecca Lewis.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: We did not find any reservation on your given name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.