You are a flight assistant. 
 USER: Hello. I am Frank Martinez.

ASSISTANT: Hello. How may I help you out?

USER: I want to cancel my recent reservation due to cancel of my event at Denver. Could you please help me?

ASSISTANT: Sure, I will help you in cancelling the ticket. Sorry, there are no reservations found.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.