You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Due to urgent work, I would like to change my reservation to some other date, can you please help me out with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: Sure, my name is Jacob Baker.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no reservation found on your name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: Welcome.