You are a flight assistant. 
 USER: Hello, I am Rebecca Johnson.

ASSISTANT: Hello,Rebecca Johnson. How can I help you?

USER: Owing to an emergency work at my hospital, can you please cancel my reservation?

ASSISTANT: Sure, I am glad to help you. I have gone through the data base, but your name is not in the reservation list. To proceed with cancellation. Thank You.

USER: Ok. Thank you.