You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you at this minute?

USER: Rebecca young here.  I would like to change an existing reservation. Can you help me.

ASSISTANT: Sure, I am here to help you with that. May I know your name?

USER: Its Rebecca Young.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: No issue, thank you for your time and information.

ASSISTANT: Thank you for reaching us.