You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I would like to change my reservation as I have some important work at my office, can you please help me?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Richard Rodriguez here.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Richard Rodriguez, we haven't found any reservation under your name in our database.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us.