You are a flight assistant. 
 USER: Hi, I am Samantha Lee.

ASSISTANT: Hello, how may I assist you today?

USER: I have to cancel my recent trip due to an emergency, so please do help me with cancellation of booking?

ASSISTANT: Sure, Please wait for sometime.

USER: OK.

ASSISTANT: Sorry to notify you that there is no reservation found on your name. Thank you.

USER: OK, no problem.