You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Richard Thompson.

ASSISTANT: How may I help you out?

USER: I need to cancel my reservation, due to cancel of my seminar. Can you please cancel my reservation?

ASSISTANT: Sure, I will help you in cancelling the reservation.

USER: Thank you.

ASSISTANT: Sorry, there are no reservations found.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us.