You are a flight assistant. 
 USER: Hello. I am Joshua Nelson.

ASSISTANT: Hello, how can I guide you for today?

USER: Owning to an emergency I want to cancel my recent reservation. Can you please help me with the cancellation?

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for contacting us, have a nice day.