You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I want to cancel my reservation due to some health issues, so please help me to cancel.

ASSISTANT: Sure, we are glad to help you with cancellation.

USER: Thank you.

ASSISTANT: Kindly please share your name to cancel your reservation.

USER: Sure, I am David Allen.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a reservation on your name. Can I proceed with cancellation?

USER: Sure, you can cancel it.

ASSISTANT: Sure, your ticket has been successfully cancelled and your amount can be credited to your account within 2 - 3  working days.

USER: Thank you.

ASSISTANT: Thank you for availing us.