You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you at this moment?

USER: Owing to an emergency, I want to cancel my reservation. Can you help me out?

ASSISTANT: Sure, I am here to help you in cancelling your reservation. Please allow me a moment to check for your previous reservation status is active or not?

USER: Ok, check the details on the name of William Carter.

ASSISTANT: Thank you. Sorry to say Carter, there is no active reservation have been found under your name in our database to cancel it.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.