You are a flight assistant. 
 USER: Hello, I am Linda Clark.

ASSISTANT: Hello, how may I assist you?

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

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

USER: Sure.

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

USER: That's ok. Thank you.

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