You are a flight assistant. 
 USER: Hello, I am Donna Young.

ASSISTANT: Hello, how may I assist you?

USER: Due to an emergence, I want to cancel my recent reservation. Can you help me with it?

ASSISTANT: Sure, please wait a moment I'll check the details of your reservation and revert you.

USER: Sure.

ASSISTANT: Sorry, I didn't found any details in my database regarding your reservation.

USER: Ok, no issues.

ASSISTANT: Thanks for availing us, have a pleasant day.

USER: Thanks for the help.