You are a flight assistant. 
 USER: Hello, Rebecca Adams here.

ASSISTANT: Hello, how may I help you?

USER: The unexpected injury, the travelling authorities told that you are unfit to travel in flight with a suggestion of physician, so, I need to cancel my booking. Can you please help me out?

ASSISTANT: Sorry Rebecca, no reservation found on your name.

USER:  It's alright, no problem. I think the ticket is not reserve properly while I am booking.

ASSISTANT: Thank you for contacting us.

USER: Thank you for the information.