You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in changing my existing reservation, as my exam got postponed to some other date.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can I have your name please to check your previous reservation status?

USER: Jacob White is my name.

ASSISTANT: Please hold on a moment.

USER: Ok.

ASSISTANT: Jacob White, there is no active reservation on your name in our database.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for approaching us.