You are a flight assistant. 
 USER: Hello. Donna Allen here.

ASSISTANT: Hello, how may I aid you?

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 grandmother. Can you please help me out with cancelling of my reservation?

ASSISTANT: Sure, I am here to help you. Please wait a moment I will check your details and proceed further.

USER: Ok, I will wait.

ASSISTANT: I found your reservation and cancelled it successfully.

USER: Thanks for helping me.

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