You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my reservation which I have done earlier to participate in dance programme but unfortunately I have stay back here to take care of my injured friend, can you please help me?

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, there is no reservation found basis on your details.

USER: Ok, no problem.

ASSISTANT: May I know your name please?

USER: Sure, my name is Nicole Miller.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for your service.