You are a flight assistant. 
 USER: Hello. I am Karen Anderson.

ASSISTANT: Hello, how may I help you for the day?

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

ASSISTANT: Sure, we are here to help you. Please wait for a while.

USER: OK, take your time.

ASSISTANT: Sorry to notify that we couldn't find any reservation with your name to cancel your reservation.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching us.