You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am Stephanie Adams. Owing a private work, I would like to change my reservation. Help me in changing my reservation.

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Sorry to say that there is no reservation found on your name.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.