You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Melissa Nelson here. Due to some health issue I am not able to participate in dance program so please cancel my reservation.

ASSISTANT: Please wait a while.

USER: Ok.

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

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.