You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Owning to an emergency, I want to cancel my recent reservation. Can you please help me out?

ASSISTANT: Sure, can I know your name for checking the reservation?

USER: Sure, my name is Sharon Brown.

ASSISTANT: Sorry, there is no reservation available on your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are welcome.