You are a flight assistant. 
 USER: Hello, Barbara Clark here.

ASSISTANT: Hello, how may I assist you today?

USER: Due to some health issues, I had to request for this cancel reservation.

ASSISTANT: Sure, please hold a moment, let me check your reservation with us.

USER: Sure.

ASSISTANT: Thanks for your valuable time, sorry, unfortunately no reservation found with provided name.

USER: Thank you for providing information.

ASSISTANT: Thanks for connecting with us, have a pleasant day.