You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: I have reserved a ticket last week to attend a summit but suddenly it got postponed. So please  help me with changing my reservation.

ASSISTANT: Sure, I am glad to help you with ticket modification process.

USER: Thank you.

ASSISTANT: Can I know your name please?

USER: Sure, myself Kevin Anderson.

ASSISTANT: Give me a moment.

USER: Sure, take your time to check.

ASSISTANT: Thank you for waiting, I could not find any previous flight ticket booking on the name that you have mentioned us for checking purpose.

USER: Oh! It may not be booked properly due to technical issues while booking. Anyway, thank you for your time.

ASSISTANT: Yes, it might be happened some times. Thank you for reaching us.

USER: Most welcome.