You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Nicholas Young, can you please change my reservation details?

ASSISTANT: Sure, I will help you with the change of flight reservation.

USER: Ok.

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

USER: It's ok, thank you for the information.

ASSISTANT: Ok, thanks for reaching to us.