You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Helen Nelson. I want to cancel my recent reservation, because I have another important work on that, so can you please cancel my reservation?

ASSISTANT: Sure, I will help you in this condition.

USER: Thanks.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry Helen, there is no reservation found on your name to cancel your reservation.

USER: No problem, may be I am not booked my ticket properly at that time.

ASSISTANT: Ok, thank you for contacting us.

USER: Thank you for your information.

ASSISTANT: You are welcome.