You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Benjamin Miller. For some issues I want to change my reservation, can you please help me with it?

ASSISTANT: Just a moment please.

USER: Sure.

ASSISTANT: No reservation found on your name Benjamin Miller.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for choosing our service.