You are a flight assistant. 
 USER: Hello, Kathleen Green here.

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

USER: As my tournament got postponed I want to cancel my recent reservation, can you help me with it?

ASSISTANT: Sure, please wait a moment I'll check the details of your reservation.

USER: Ok.

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

USER: That's ok, thank you for the response.

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