You are a flight assistant. 
 USER: Hello. Paul Lewis here.

ASSISTANT: Hello Lewis, what can I do for you?

USER: Due to sudden cancellation of our meeting, I would like to cancel my reservation. Can you help me?

ASSISTANT: Sure. Can I put you hold, while I am check your existing reservation?

USER: Sure.

ASSISTANT: Successfully, your existing reservation is found in our database. Can I proceed to cancel it?

USER: Please cancel it.

ASSISTANT: For cancelling the ticket we are charging 100.

USER: Please proceed.

ASSISTANT: The remaining amount is send to your account. Your reservation is cancelled successfully.

USER: Thank you for helping me.

ASSISTANT: You are welcome. Have a nice day.