You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How may I amend you?

USER: I'm Joseph Scott.

ASSISTANT: Ok.

USER: Owing to an emergency, I need to cancel my reservation.

ASSISTANT: Sure, I will check with reservation list and revert to you.

USER: Ok.

ASSISTANT: Ok, thanks for your time. Joseph Scott, no seat is reserved with any flight. Thanks for reaching us, Have a great day.

USER: Thanks.