You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, I am cancelling my ticket. So, please check with name Nicole Evans for cancellation.

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

USER: Sure.

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

USER: Ok, thanks for sharing information.

ASSISTANT: Thanks for reaching us. Have a nice day!.