You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I had planned an event with my office colleagues but suddenly it got postponed. So please help me with changing my reservation.

ASSISTANT: Sure, can I know your name please?

USER: Thank you. Sure, myself Kevin Thompson.

ASSISTANT: Sorry Kevin, there is no reservation found on your name.

USER: Oh! It may not be booked properly due to server issue.

ASSISTANT: Thank you for approaching us.

USER: Anyway, thank you for your time.