You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I amend you?

USER: I want to cancel my reservation, due to I am not issued with leave during my journey period. Can you help me?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: Patrick Hill, is my name.

ASSISTANT: Ok, please wait for a while, I will check with the reservation list and revert to you.

USER: Sure.

ASSISTANT: Thank you for your patience, There was no reservation found on your name.

USER: Ok, no problem at all. Thanks for informing me.

ASSISTANT: Thank you for availing us.