You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How shall I help you?

USER: I am Sandra Hernandez. Would it be possible to cancel my reservation?

ASSISTANT: Sure, I can help you out in flight ticket cancellation. Please allow me a moment to check your previous booking.

USER: Sure, take your time.

ASSISTANT: Thank you for your patience, I have checked based on your request there is no reservation found for the name that you have provided us for checking purpose.

USER: It's ok, thanks for your information.

ASSISTANT: It's my pleasure and thank you for consulting our agency, have a great day.