You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I help you?

USER: Myself Sarah Wright. I want to cancel my flight ticket due to some problems I am unable to travel so please cancel my flight ticket?

ASSISTANT: There is no reservation found by name Sarah Wright. Thank you.

USER: How is it possible? I got a confirmation message when I booked my flight ticket.

ASSISTANT: I regret, no reservation found.

USER: It' ok, thank you for your information.