You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Christine Evans.

ASSISTANT: How can I aid you at this moment?

USER: I need to do some changes in my previous reservation due to my planned event got postponed. So please help me with changing my reservation.

ASSISTANT: Sure, I am happy to help you with that. Please hold on a moment, I will check your reservation status.

USER: Thank you. I will wait for your response.

ASSISTANT: There is no previous reservation available in your name.

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

ASSISTANT: Thank you for choosing us.