You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I would like to change my reservation as I am leaving for delegates meet, can you please help me out?

ASSISTANT: Yes, I am here to help you. May I know your name please?

USER: Thank you. Brian Turner here.

ASSISTANT: Ok, please stand by.

USER: Sure.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: Ok no problem, thank you for your services.

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