You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I assist you?

USER: I would like to change my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, may I know your name?

USER: Thank you for accepting my request.

ASSISTANT: Please give me a moment.

USER: Myself Cynthia Campbell.

ASSISTANT: There is no reservation found with your given name.

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

ASSISTANT: Thank you for choosing us.