You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need you to change my recent booking.

ASSISTANT: Sure, I can help you. Please wait, let me check your reservation status in our database. May I know your name?

USER: My name is Ronald Allen.

ASSISTANT: Sorry, I have not found any reservation under your name in our database.

USER: That's ok. Thank you.

ASSISTANT: You are welcome.