You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid 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 am blissful to help you out. Please can you provide me your name to check your reservation on your name.

USER: Thank you, myself David Gonzalez.

ASSISTANT: Sorry David, here I didn't find any active reservation on your name.

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

ASSISTANT: Thank you for reaching us.