You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please assist me to cancel the existing reservation?  Because my health is no good so, I can't travel.

ASSISTANT: Sure, I am here to help you.

USER: Thank you for considering my request.

ASSISTANT: May I know your good name please?

USER:  I am Joshua Edwards.

ASSISTANT: There is reservation found as per your name, shall I cancel it?

USER: That's great, please proceed with the ticket cancellation.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you for your help in cancelling the ticket.

ASSISTANT: You are welcome.