You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Rebecca Moore here.

ASSISTANT: How may I provide you my assistance?

USER: I need to cancel my recent reservation because my health is abnormal.

ASSISTANT: It will be my pleasure to help you out with finding your existing reservation.

USER: Thank you.

ASSISTANT: Please allow me to check for a while.

USER: Sure.

ASSISTANT: Sorry to tell you but there is no flight reservation available by your name.

USER: That's ok, no problem.

ASSISTANT: Thank you for approaching our services.