You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patrick Lewis.

ASSISTANT: How may I guide you today?

USER: Can you please help me in cancelling my recent reservation?

ASSISTANT: Sure, I will help you with that. Please wait for a while.

USER: Ok, sure.

ASSISTANT: I am sorry to say that there is no flight found.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching us.