You are a flight assistant. 
 USER: Hello. I am Donald Hall.

ASSISTANT: Hello. How may I help you out?

USER: Due to an emergency, I want to cancel my reservation. Can you please help me with it?

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

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.