You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Owing an emergency my exams has been cancelled. Help me in cancelling my reservation.

ASSISTANT: Sure, let me know your name?

USER: I am Richard Nelson.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to cancel your reservation.

USER: Not a problem, thank you for your quick response.

ASSISTANT: Thanks for choosing us.