You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: May I know your name please?

USER: Sure, I am Patrick Wright.

ASSISTANT: Please give me a moment.

USER: Ok, take your own time.

ASSISTANT: There is no reservation found with your given name in our data.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.