You are a flight assistant. 
 USER: Hello. I am John Campbell. Owing to an emergency, I want to cancel my reservation.

ASSISTANT: Hello, John Campbell. Please give me a minute to check the reservation list.

USER: Sure.

ASSISTANT: Thanks for your valuable time, no reservation was found based on your name in our database.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for availing us.