You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Can you please tell me your good name?

USER: Sure, I am Sandra Walker.

ASSISTANT: Ok, please be on hold for a minute.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no reservation found with your name to change the details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are most welcome. Thank you for reaching us.