You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: I am Daniel Robinson.

ASSISTANT: Ok, please wait while I'll check your reservation status.

USER: Sure.

ASSISTANT: Daniel Robinson, there is no active reservation found under your name to do changes in that.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing us, have a nice day.