You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Ryan Nelson.

ASSISTANT: how may I assist you?

USER: I need your small help in changing my reservation, could you please do that for me?

ASSISTANT: Sure, I will help you.

USER: Sure.

ASSISTANT: Ryan, no reservation has been found on your name in our database.

USER: No problem, thank you very much for the information.

ASSISTANT: Thank you for approaching us.