You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Aid me in changing my previous flight reservation. As I modified my journey dates.

ASSISTANT: Sure. Tell me your name please?

USER: Thanks for accepting my request.

ASSISTANT: Ok.

USER: Stephanie Carter here.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no flight reservation on your name to change it.

USER: Ok, not an issue.

ASSISTANT: Thank you.

USER: Thanks for checking.