You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: I want to change my existing reservation, please help me out.

ASSISTANT: Sure. May I know your good name?

USER: I am Kimberly jackson.

ASSISTANT: Please, wait. Thanks for waiting, there is no reservation found on your name.

USER: No issues, thank you.

ASSISTANT: Thank you.