You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I have an earlier reservation to sign a new contract for new project, due to some problems it got postponed. Can you please help me in changing my reservation.

ASSISTANT: Let me know your name.

USER: Sure, my name is Dorothy Young.

ASSISTANT: Sorry, no reservation found by your name.

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

ASSISTANT: Thank you.

USER: Welcome.