You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Assist me in changing my previous flight reservation. As I modified my travel dates.

ASSISTANT: Sure, I am happy to help you. May I know your name?

USER: Thanks for accept my request.

ASSISTANT: Can I know your name?

USER: Amy Jones here.

ASSISTANT: Thank you. Please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found under your name.

USER: Ok, not an issue. Thanks for checking.

ASSISTANT: You are welcome.