You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: My name is Andrew Johnson. Owing an emergency, I want to cancel my reservation. Can you help me for that?

ASSISTANT: Sure, I am gleeful to help you to cancel your reservation.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, I didn't find any reservation on your name in our database to cancel your reservation.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us, have a great day.