You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Stephen Nelson here. I have to cancel my reservation which I have done earlier to participate in dance program but unfortunately I have stay back here to take care of my injured friend. Can you please help me out with cancelling of my reservation?

ASSISTANT: Please wait a while, I will check and inform you.

USER: Ok, take your time.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Thank you for opting us.

USER: Welcome.