You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Alexander Brown. Can you help me to cancel my reservation? Because I have some business work on that dates.

ASSISTANT: Sure, I am glad to help you. Please wait a moment I will check your complete reservation details and proceed further.

USER: Sure.

ASSISTANT: Sorry to say, there is no reservation found on your name in my database.

USER: Ok, thank you for your time.

ASSISTANT: Thank you for choosing us, have a nice day.