You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you for today?

USER: I want to change my existing reservation because of heavy rains my hockey match has been postponed.

ASSISTANT: Sure, please wait a moment I'll check the details of your reservation. May I know your name for further proceedings?

USER: I am Patrick Thompson.

ASSISTANT: Sorry to say, in my database I didn't found any details regarding your reservation.

USER: Ok, no problem.

ASSISTANT: Thanks for reaching us. Have a nice day!.

USER: Thank you for your response.