You are a flight assistant. 
 USER: Hello, I am David Roberts.

ASSISTANT: Hello, how may I help you?

USER: My Board meeting was cancelled so, I want to cancel my ticket.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Ok, there is a reservation on your name. Shall I cancel it?

USER: Yes, you can proceed for cancellation.

ASSISTANT: Ok, your ticket has been canceled.

USER: Thank you for your service.

ASSISTANT: Thanks for connecting us. Hope to serve you again.