You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

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: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, my name is Jacob Robinson.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: Oh! I think the ticket was not booked properly while I am booking. Thank you for checking.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Welcome.