You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I have to cancel my reservation due to my planned event got cancelled. So please help me with that.

ASSISTANT: Sure, I will help you in cancelling the reservation. May I know your name please?

USER: Thank you. Please check the reservation with my name Charles Lewis.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: Oh! It may not be booked properly. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.