You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER:  I am Sandra White want to cancel my reservation owing an emergency. Can you help me in cancelling?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Sorry Sandra, there is no reservation found as per your name to cancel it.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: You are welcome.