You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Will you help me in cancelling my reservation as my exams were preponed.

ASSISTANT: Sure, may I know your good name?

USER: I am Donald Edward.

ASSISTANT: No reservation found on your name.

USER: It's ok. Thank you.

ASSISTANT: Thank you for choosing us, have a great day.