You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: James Williams here.

ASSISTANT: James, how can I assist you?

USER: I want to cancel my ticket as I am sick.

ASSISTANT: Sure, I can help you with that. Please wait, I will check your reservation status and get back to you.

USER: Sure.

ASSISTANT: Sorry James, I did not find any reservation by your name in our database.

USER: No problem, thank you.

ASSISTANT: You are welcome and have a nice day.