You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: May I know your name for checking the reservation?

USER: Ok, I am Samuel Young.

ASSISTANT: Sorry to say, no reservation found with your name.

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

ASSISTANT: Thanks for reaching us.