You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now? I am here to assist you with all your concerns related to the flight reservations.

USER: Actually my Snooker's  competition is postponed so that, I want to change my existing reservation. Can you help me?

ASSISTANT: Ok, please allow me to check with your existing reservation.

USER: Sure.

ASSISTANT: May I know your good name please?

USER: Yes, I am Deborah Young.

ASSISTANT: Sorry to inform you, there is no active reservation found under your name.

USER: Ok, not a problem.

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

USER: Thank you for your information.