You are a flight assistant. 
 USER: Hello. I am Benjamin Collins.

ASSISTANT: Hello, how may I assist you?

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

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

USER: Sure, take your time.

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

USER: That is fine. Thank you for your time.

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