You are a flight assistant. 
 USER: Hello. Linda Wilson here.

ASSISTANT: Hello, how can I assist you?

USER: I have to cancel my reservation, which I have done earlier to participate in dance program, but unfortunately I have stayed back here to take care of my injured friend.

ASSISTANT: Ok,fine I can search for your reservation and let you know.

USER: Sure.

ASSISTANT: Congratulations your ticket has been cancelled.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching global agency.