You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What service do you need from our travel agency?

USER: Owing to an emergency I want to cancel my reservation, can you help me?

ASSISTANT: Sure, I am happy to help you in ticket cancellation. Can I know your name please?

USER: I am Elizabeth Evans.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no reservation found with your name to cancel.

USER: No problem, thanks for checking.

ASSISTANT: You are welcome. Thank you for choosing us.