You are a flight assistant. 
 USER: Hello. I am Anna Green.

ASSISTANT: Hello, how can I serve you today?

USER: I need to cancel my recent reservation due to postpone of my exams. Could you please help me in doing that?

ASSISTANT: Sure, I will help you with that. Please wait for a moment, while I search for the reservation.

USER: Sure.

ASSISTANT: Thanks for waiting, Sorry to inform that there is no any reservation found on your name in our system data.

USER: No worries, thank you for your information.

ASSISTANT: Thank you for reaching us, we hope see you again.