You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for the day?

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

ASSISTANT: Sure, may I know your name?

USER: Yes, I am Sandra Taylor.

ASSISTANT: Please wait a minute, I will check your reservation status and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say that there is no reservation found on your name.

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

ASSISTANT: Thank you for opting us.