You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to change my reservation due to my planned event got postponed. So please help me with changing my reservation.

ASSISTANT: Sure, I will help you. Can you please tell me your name?

USER: Sure, myself Jonathan Scott.

ASSISTANT: Sorry, there is no reservation with your name to change further.

USER: Oh! It may not be booked properly due to server issue. Anyway, thank you for your time.

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