You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I have 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 out with cancelling of my recent reservation?

ASSISTANT: Sure, could I have your name please?

USER: Thank you for considering my request and my name is Mark Lopez.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to cancel further.

USER: Ok, that's fine. Thank you for your help.

ASSISTANT: You are welcome.