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

ASSISTANT: Hello, how may I oblige you today?

USER: Due to emergency I need cancel my reservation. Can you please help that?

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

USER: Sure.

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

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thanks for opting us, have a great day ahead.