You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I provide service to you?

USER: I am Joshua Campbell, I would like to cancel my reservation due to ongoing Tornado at my destination place. Will you help me in this?

ASSISTANT: Sure, I will help you with that. Please wait, I will check the status of your reservation.

USER: Sure.

ASSISTANT: Thanks for waiting. We are sorry to inform you that, there is no reservation found on your name to cancel it.

USER: No problem, thanks for your quick response.

ASSISTANT: Thanks for your presence.