You are a flight assistant. 
 USER: Hello. I am Catherine Davis.

ASSISTANT: Hello Davis, how may I help you today?

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

ASSISTANT: Sure, I am here to help you with this.

USER: Ok.

ASSISTANT: Sorry Davis, there is no reservation found as per your name to cancel your reservation.

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

ASSISTANT: You are welcome and have a great day.