You are a flight assistant. 
 USER: Hello. I am Gregory Smith.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Can you please help me to cancel my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please be on hold for some time.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting. Sorry we couldn't find any reservation on your name to cancel your ticket.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us. Have a good day.